Initial checkin

14 files changed, 5349 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2fc25b9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,50 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+20
+21
+22
+23
+24
+25
+1a
+2a
+3a
+4a
+5a
+6a
+7a
+8a
+9a
+10a
+11a
+12a
+13a
+14a
+15a
+16a
+17a
+18a
+19a
+20a
+21a
+22a
+23a
+24a
+25a
diff --git a/1.c b/1.c
new file mode 100644
index 0000000..7041065
--- /dev/null
+++ b/1.c
@@ -0,0 +1,26 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(void)
+{
+    char buff[80];
+    int last = -1;
+    int count = 0;
+
+    while(fgets(buff, sizeof buff, stdin))
+    {
+        int i = atoi(buff);
+
+        if (last != -1 && last < i)
+        {
+            printf("%d\n", i);
+            count++;
+        }
+
+        last = i;
+    }
+
+    printf("count=%d\n", count);
+
+    return 0;
+}
diff --git a/1a.c b/1a.c
new file mode 100644
index 0000000..725aa45
--- /dev/null
+++ b/1a.c
@@ -0,0 +1,36 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(void)
+{
+    char buff[80];
+    int last = -1;
+    int count = 0;
+    int data[2000];
+    int f,i;
+
+    i = 0;
+
+    for(i = 0; i < 2000; i++)
+    {
+        fgets(buff, sizeof buff, stdin);
+        data[i] = atoi(buff);
+    }
+
+    for(f = 0; f < 1998; f++)
+    {
+        i = data[f] + data[f+1] + data[f+2];
+
+        if (last != -1 && last < i)
+        {
+            printf("%d\n", i);
+            count++;
+        }
+
+        last = i;
+    }
+
+    printf("count=%d\n", count);
+
+    return 0;
+}
diff --git a/2.c b/2.c
new file mode 100644
index 0000000..84b511c
--- /dev/null
+++ b/2.c
@@ -0,0 +1,50 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+int main(void)
+{
+    char buff[80];
+    int depth = 0;
+    int horiz = 0;
+
+    while(fgets(buff, sizeof buff, stdin))
+    {
+        char *tok[2] = {0};
+
+        tok[0] = strtok(buff," ");
+
+        if (tok[0]) tok[1] = strtok(NULL, " ");
+
+        if (tok[0] && tok[1])
+        {
+            int i = atoi(tok[1]);
+
+            if(strcmp(tok[0], "forward") == 0)
+            {
+                horiz += i;
+            }
+
+            if(strcmp(tok[0], "down") == 0)
+            {
+                depth += i;
+            }
+
+            if(strcmp(tok[0], "up") == 0)
+            {
+                depth -= i;
+            }
+        }
+        else
+        {
+            printf("Bad input");
+            exit(1);
+        }
+    }
+
+    printf("depth=%d\n", depth);
+    printf("horiz=%d\n", horiz);
+    printf("product=%d\n", depth*horiz);
+
+    return 0;
+}
diff --git a/2a.c b/2a.c
new file mode 100644
index 0000000..180d72a
--- /dev/null
+++ b/2a.c
@@ -0,0 +1,53 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+int main(void)
+{
+    char buff[80];
+    int depth = 0;
+    int aim = 0;
+    int horiz = 0;
+
+    while(fgets(buff, sizeof buff, stdin))
+    {
+        char *tok[2] = {0};
+
+        tok[0] = strtok(buff," ");
+
+        if (tok[0]) tok[1] = strtok(NULL, " ");
+
+        if (tok[0] && tok[1])
+        {
+            int i = atoi(tok[1]);
+
+            if(strcmp(tok[0], "forward") == 0)
+            {
+                horiz += i;
+
+                depth += i * aim;
+            }
+
+            if(strcmp(tok[0], "down") == 0)
+            {
+                aim += i;
+            }
+
+            if(strcmp(tok[0], "up") == 0)
+            {
+                aim -= i;
+            }
+        }
+        else
+        {
+            printf("Bad input");
+            exit(1);
+        }
+    }
+
+    printf("depth=%d\n", depth);
+    printf("horiz=%d\n", horiz);
+    printf("product=%d\n", depth*horiz);
+
+    return 0;
+}
diff --git a/3.c b/3.c
new file mode 100644
index 0000000..39db01d
--- /dev/null
+++ b/3.c
@@ -0,0 +1,75 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+static int FromBin(const char *p)
+{
+    int b = strlen(p) - 1;
+    int v = 0;
+    int f;
+
+    for(f = 0; p[f]; f++, b--)
+    {
+        if (p[f] == '1')
+        {
+            v |= 1 << b;
+        }
+    }
+
+    return v;
+}
+
+int main(void)
+{
+    char buff[80];
+    int bit[12] = {0};
+    int count = 0;
+    char str[13] = {0};
+    int f;
+    int gamma, epsilon;
+
+    while(fgets(buff, sizeof buff, stdin))
+    {
+        for(f = 0; f < 12; f++)
+        {
+            if (buff[f] == '1')
+            {
+                bit[f]++;
+            }
+        }
+
+        count++;
+    }
+
+    for(f = 0; f < 12; f++)
+    {
+        if (bit[f] > count / 2)
+        {
+            str[f] = '1';
+        }
+        else
+        {
+            str[f] = '0';
+        }
+    }
+
+    gamma = FromBin(str);
+
+    for(f = 0; f < 12; f++)
+    {
+        if (str[f] == '0')
+        {
+            str[f] = '1';
+        }
+        else
+        {
+            str[f] = '0';
+        }
+    }
+
+    epsilon = FromBin(str);
+
+    printf("%d\n", gamma * epsilon);
+
+    return 0;
+}
diff --git a/3a.c b/3a.c
new file mode 100644
index 0000000..e0b98e4
--- /dev/null
+++ b/3a.c
@@ -0,0 +1,182 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+static int FromBin(const char *p)
+{
+    size_t b = strlen(p) - 1;
+    int v = 0;
+    int f;
+
+    for(f = 0; p[f]; f++, b--)
+    {
+        if (p[f] == '1')
+        {
+            v |= 1 << b;
+        }
+    }
+
+    return v;
+}
+
+static void Chomp(char *p)
+{
+    size_t l = strlen(p);
+
+    while(l && p[l-1] == '\n')
+    {
+        p[--l] = 0;
+    }
+}
+
+int main(void)
+{
+    char nums[1000][14] = {0};
+    char work[1000][14] = {0};
+    char buff[80];
+    int bit[12] = {0};
+    int count = 0;
+    char str[13] = {0};
+    int b;
+    int f;
+    int n;
+    int oxygen;
+    int co2;
+    int lines = 0;
+
+    count = 0;
+
+    while(fgets(buff, sizeof buff, stdin))
+    {
+        Chomp(buff);
+        strcpy(nums[count++], buff);
+    }
+
+    lines = count;
+
+    count = 0;
+    memcpy(work, nums, sizeof nums);
+    b = 0;
+
+    while(count != 1)
+    {
+        for(f = 0; f < 12; f++)
+        {
+            bit[f] = 0;
+        }
+
+        count = 0;
+
+        for(n = 0; n < lines; n++)
+        {
+            if (work[n][0])
+            {
+                for(f = 0; f < 12; f++)
+                {
+                    if (work[n][f] == '1')
+                    {
+                        bit[f]++;
+                    }
+                }
+
+                count++;
+            }
+        }
+
+        if (count == 1)
+        {
+            for(n = 0; n < lines; n++)
+            {
+                if (work[n][0])
+                {
+                    oxygen = FromBin(work[n]);
+                }
+            }
+        }
+        else
+        {
+            char c;
+
+            c = bit[b] >= count/2.0 ? '1':'0';
+
+            for(n = 0; n < lines; n++)
+            {
+                if (work[n][b] != c)
+                {
+                    work[n][0] = 0;
+                }
+            }
+
+            if (b < 11)
+            {
+                b++;
+            }
+        }
+    }
+
+    count = 0;
+    memcpy(work, nums, sizeof nums);
+    b = 0;
+
+    while(count != 1)
+    {
+        for(f = 0; f < 12; f++)
+        {
+            bit[f] = 0;
+        }
+
+        count = 0;
+
+        for(n = 0; n < lines; n++)
+        {
+            if (work[n][0])
+            {
+                for(f = 0; f < 12; f++)
+                {
+                    if (work[n][f] == '1')
+                    {
+                        bit[f]++;
+                    }
+                }
+
+                count++;
+            }
+        }
+
+        if (count == 1)
+        {
+            for(n = 0; n < lines; n++)
+            {
+                if (work[n][0])
+                {
+                    co2 = FromBin(work[n]);
+                }
+            }
+        }
+        else
+        {
+            char c;
+
+            c = (bit[b] < count/2.0) ? '1':'0';
+
+            for(n = 0; n < lines; n++)
+            {
+                if (work[n][b] != c)
+                {
+                    work[n][0] = 0;
+                }
+            }
+
+            if (b < 11)
+            {
+                b++;
+            }
+        }
+    }
+
+    printf("oxygen %d\n", oxygen);
+    printf("co2 %d\n", co2);
+    printf("product %d\n", oxygen * co2);
+
+    return 0;
+}
diff --git a/4.c b/4.c
new file mode 100644
index 0000000..4851248
--- /dev/null
+++ b/4.c
@@ -0,0 +1,132 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#define MAX_BOARDS 100
+
+static char *ReadLine(char *p, size_t size, FILE *fp)
+{
+    if ((p=fgets(p, size, fp)))
+    {
+        size_t l = strlen(p);
+
+        while(l && p[l-1] == '\n')
+        {
+            p[--l] = 0;
+        }
+    }
+
+    return p;
+}
+
+int main(void)
+{
+    char buff[1024];
+    int *num = NULL;
+    int num_count = 0;
+    int board[MAX_BOARDS][5][5] = {0};
+    int board_count = 0;
+    char *p = NULL;
+    int f = 0;
+    int x = 0;
+    int y = 0;
+    int i = 0;
+    int winner_board = -1;
+    int winner_num = -1;
+    int sum = 0;
+
+    ReadLine(buff, sizeof buff, stdin);
+
+    p = strtok(buff, ",");
+
+    while(p)
+    {
+        num = realloc(num, (num_count + 1) * sizeof *num);
+        num[num_count++] = atoi(p);
+        p = strtok(NULL, ",");
+    }
+
+    while (ReadLine(buff, sizeof buff, stdin))
+    {
+        if (board_count == MAX_BOARDS)
+        {
+            printf("Too many boards\n");
+            return 1;
+        }
+
+        for(y = 0; y < 5; y++)
+        {
+            ReadLine(buff, sizeof buff, stdin);
+
+            for(x = 0; x < 5; x++)
+            {
+                p = strtok(x == 0 ? buff : NULL, " ");
+                board[board_count][y][x] = atoi(p);
+            }
+        }
+
+        board_count++;
+    }
+
+    for(i = 0; i < num_count && winner_board == -1; i++)
+    {
+        for(f = 0; f < board_count; f++)
+        {
+            for(y = 0; y < 5; y++)
+            {
+                for(x = 0; x < 5; x++)
+                {
+                    if (board[f][y][x] == num[i])
+                    {
+                        board[f][y][x] = 0;
+                    }
+                }
+            }
+        }
+
+        for(f = 0; f < board_count && winner_board == -1; f++)
+        {
+            for(y = 0; y < 5; y++)
+            {
+                if (board[f][y][0] == 0 &&
+                    board[f][y][1] == 0 &&
+                    board[f][y][2] == 0 &&
+                    board[f][y][3] == 0 &&
+                    board[f][y][4] == 0)
+                {
+                    winner_board = f;
+                    winner_num = num[i];
+                }
+            }
+
+            for(x = 0; x < 5; x++)
+            {
+                if (board[f][0][x] == 0 &&
+                    board[f][1][x] == 0 &&
+                    board[f][2][x] == 0 &&
+                    board[f][3][x] == 0 &&
+                    board[f][4][x] == 0)
+                {
+                    winner_board = f;
+                    winner_num = num[i];
+                }
+            }
+        }
+    }
+
+    printf("winner_board = %d\n", winner_board);
+    printf("winner_num = %d\n", winner_num);
+
+    for(y = 0; y < 5; y++)
+    {
+        for(x = 0; x < 5; x++)
+        {
+            sum += board[winner_board][y][x];
+        }
+    }
+
+    printf("sum = %d\n", sum);
+    printf("product = %d\n", sum * winner_num);
+
+    return 0;
+}
diff --git a/4a.c b/4a.c
new file mode 100644
index 0000000..4851248
--- /dev/null
+++ b/4a.c
@@ -0,0 +1,132 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#define MAX_BOARDS 100
+
+static char *ReadLine(char *p, size_t size, FILE *fp)
+{
+    if ((p=fgets(p, size, fp)))
+    {
+        size_t l = strlen(p);
+
+        while(l && p[l-1] == '\n')
+        {
+            p[--l] = 0;
+        }
+    }
+
+    return p;
+}
+
+int main(void)
+{
+    char buff[1024];
+    int *num = NULL;
+    int num_count = 0;
+    int board[MAX_BOARDS][5][5] = {0};
+    int board_count = 0;
+    char *p = NULL;
+    int f = 0;
+    int x = 0;
+    int y = 0;
+    int i = 0;
+    int winner_board = -1;
+    int winner_num = -1;
+    int sum = 0;
+
+    ReadLine(buff, sizeof buff, stdin);
+
+    p = strtok(buff, ",");
+
+    while(p)
+    {
+        num = realloc(num, (num_count + 1) * sizeof *num);
+        num[num_count++] = atoi(p);
+        p = strtok(NULL, ",");
+    }
+
+    while (ReadLine(buff, sizeof buff, stdin))
+    {
+        if (board_count == MAX_BOARDS)
+        {
+            printf("Too many boards\n");
+            return 1;
+        }
+
+        for(y = 0; y < 5; y++)
+        {
+            ReadLine(buff, sizeof buff, stdin);
+
+            for(x = 0; x < 5; x++)
+            {
+                p = strtok(x == 0 ? buff : NULL, " ");
+                board[board_count][y][x] = atoi(p);
+            }
+        }
+
+        board_count++;
+    }
+
+    for(i = 0; i < num_count && winner_board == -1; i++)
+    {
+        for(f = 0; f < board_count; f++)
+        {
+            for(y = 0; y < 5; y++)
+            {
+                for(x = 0; x < 5; x++)
+                {
+                    if (board[f][y][x] == num[i])
+                    {
+                        board[f][y][x] = 0;
+                    }
+                }
+            }
+        }
+
+        for(f = 0; f < board_count && winner_board == -1; f++)
+        {
+            for(y = 0; y < 5; y++)
+            {
+                if (board[f][y][0] == 0 &&
+                    board[f][y][1] == 0 &&
+                    board[f][y][2] == 0 &&
+                    board[f][y][3] == 0 &&
+                    board[f][y][4] == 0)
+                {
+                    winner_board = f;
+                    winner_num = num[i];
+                }
+            }
+
+            for(x = 0; x < 5; x++)
+            {
+                if (board[f][0][x] == 0 &&
+                    board[f][1][x] == 0 &&
+                    board[f][2][x] == 0 &&
+                    board[f][3][x] == 0 &&
+                    board[f][4][x] == 0)
+                {
+                    winner_board = f;
+                    winner_num = num[i];
+                }
+            }
+        }
+    }
+
+    printf("winner_board = %d\n", winner_board);
+    printf("winner_num = %d\n", winner_num);
+
+    for(y = 0; y < 5; y++)
+    {
+        for(x = 0; x < 5; x++)
+        {
+            sum += board[winner_board][y][x];
+        }
+    }
+
+    printf("sum = %d\n", sum);
+    printf("product = %d\n", sum * winner_num);
+
+    return 0;
+}
diff --git a/data.1 b/data.1
new file mode 100644
index 0000000..27245d9
--- /dev/null
+++ b/data.1
@@ -0,0 +1,2000 @@
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diff --git a/data.2 b/data.2
new file mode 100644
index 0000000..ebe7dfc
--- /dev/null
+++ b/data.2
@@ -0,0 +1,1000 @@
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new file mode 100644
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diff --git a/data.3b b/data.3b
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diff --git a/data.4 b/data.4
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