11219 How old are you.c

#include <stdio.h>

int main()
{
    int month[2], day[2], year[2], i, t, age;

    scanf("%d", &t);

    for (i = 1; i <= t; ++i)
    {
        scanf("%d/%d/%d", &day[0], &month[0], &year[0]);
        scanf("%d/%d/%d", &day[1], &month[1], &year[1]);

        if (year[1] > year[0]) printf("Case #%d: Invalid birth date\n", i);
        else if (year[1] == year[0] && month[1] > month[0]) printf("Case #%d: Invalid birth date\n", i);
        else if (year[1] == year[0] && month[1] == month[0] && day[1] > day[0]) printf("Case #%d: Invalid birth date\n", i);
        else
        {
            age = year[0] - year[1];
            if (month[0] < month[1]) age--;
            else if (month[0] == month[1] && day[1] > day[0]) age--;
            if (age > 130) printf("Case #%d: Check birth date\n", i);
            else printf("Case #%d: %d\n", i, age);
        }
    }
    return 0;
}

11332 Summing Digits.c

#include <stdio.h>

int main()
{
    int i, l, m, sum, n;

    while(scanf("%d", &n) == 1)
    {
        if (n <= 0) break;
        l = n;
        sum = 0;

        for (i = 1; i <= 10; i++)
        {
            m = l % 10;
            l = l / 10;
            sum += m;
        }

        if (sum > 9)
        {
            l = sum;
            sum = 0;

            for (i = 1; i <= 2; i++)
            {
                m = l % 10;
                l = l / 10;
                sum += m;
            }
        }

        if (sum > 9)
        {
            l = sum;
            sum = 0;

            for (i = 1; i <= 2; i++)
            {
                m = l % 10;
                l = l / 10;
                sum += m;
            }
        }

        printf("%d\n", sum);
    }
    return 0;
}

11479 Is this the easiest problem.c

#include <stdio.h>

int main()
{
    long int i, t, x, y, z;

    scanf("%ld", &t);
    for (i = 1; i <= t; i++)
    {
        scanf("%ld %ld %ld", &x, &y, &z);
        if (x>0&&y>0&&z>0)
        {
            if (x+y<=z || y+z<=x || x+z<=y) printf("Case %d: Invalid\n", i);
            else if (x == y && y == z) printf("Case %d: Equilateral\n", i);
            else if ((x == y && x != z) || (y == z && y != x) || (x == z && z != y))
                printf("Case %d: Isosceles\n", i);
            else printf("Case %d: Scalene\n", i);
        }
        else printf("Case %d: Invalid\n", i);
    }
    return 0;
}

11547 AUTOMATIC ANSWER.c

#include <stdio.h>

int main()
{
    int i, t, n, mod, res;

    scanf("%ld", &t);

    for (i = 0; i < t; ++i)
    {
        scanf("%d", &n);

        res = n * 63;
        res += 7492;
        res *= 5;
        res -= 498;
        res /= 10;

        if (res < 0) res = -res;

        mod = res % 10;

        printf("%d\n", mod);
    }
    return 0;
}

11636 Hello World!.c

#include <stdio.h>

int main()
{
    int hw, i = 1, pastes, count;

    scanf("%d", &hw);

    while (hw > 0)
    {
        pastes = 1;
        count = 2;
        if (hw == 1) pastes = 0;
        else if (hw == 2) pastes = 1;
             else while (hw > count)
                  {
                      pastes++;
                      count = count * 2;
                  }
        printf("Case %d: %d\n", i++, pastes);

        scanf("%d", &hw);
    }
    return 0;
}

11636 Hello World.c

#include <stdio.h>

int main()
{
    int hw, i = 1, pastes, count;

    scanf("%d", &hw);

    while (hw > 0)
    {
        pastes = 1;
        count = 2;
        if (hw == 1) pastes = 0;
        else if (hw == 2) pastes = 1;
             else while (hw > count)
                  {
                      pastes++;
                      count = count * 2;
                  }
        printf("Case %d: %d\n", i++, pastes);

        scanf("%d", &hw);
    }
    return 0;
}

11713 Abstract Names.c

#include <stdio.h>
#include <string.h>
#include <ctype.h>

int main()
{
    int i, j, n, len1, len2, flag;
    char a[40][20];

    scanf("%d", &n);

    for (i = 0; i < (2 * n); i += 2)
    {
        scanf("%[^\n] %[^\n]", a[i], a[i + 1]);
        len1 = strlen(a[i]);
        len2 = strlen(a[i + 1]);

        if (len1 == len2)
        {
            flag = 1;
            for (j = 0; j < len1; ++j)
            {
                if(a[i][j] != a[i + 1][j])
                {
                    if (tolower(a[i][j]) == 'a' || tolower(a[i][j]) == 'e' || tolower(a[i][j]) == 'i' ||
                        tolower(a[i][j]) == 'o' || tolower(a[i][j]) == 'u')
                    {
                        if (tolower(a[i + 1][j]) != 'a' && tolower(a[i + 1][j]) != 'e' && tolower(a[i + 1][j]) != 'i' &&
                            tolower(a[i + 1][j]) != 'o' && tolower(a[i + 1][j]) != 'u') flag = 0;
                    }
                }
            }
            if (flag == 1) printf("Yes\n");
            else printf("No\n");
        }
        else printf("No\n");
    }
    return 0;
}

11727 Cost Cutting.c

#include <stdio.h>

int main()
{
    int a, b, c, max, min, n, i;

    scanf("%d", &n);

    for (i = 0; i < n; ++i)
    {
        scanf("%d %d %d", &a, &b, &c);
        min = a < b ? (c < a ? c : a) : (c < b ? c : b);
        max = a > b ? (c > a ? c : a) : (c > b ? c : b);

        if ((a == min || a == max) && (b == min || b == max)) printf("Case %d: %d\n", i + 1, c);
        else if ((a == min || a == max) && (c == min || c == max)) printf("Case %d: %d\n", i + 1, b);
        else if ((c == min || c == max) && (b == min || b == max)) printf("Case %d: %d\n", i + 1, a);
    }
    return 0;
}

11764 Jumping Mario.c

#include <stdio.h>

int main()
{
    int t, n, up, down, now, then, i, j;

    scanf("%d", &t);

    for (i = 0; i < t; i++)
    {
        up = 0;
        down = 0;

        scanf("%d", &n);
        scanf("%d", &now);
        for (j = 1; j < n; j++)
        {
            then = now;
            scanf("%d", &now);
            if (now > then) up++;
            else if (then > now) down++;
        }
        printf("Case %d: %d %d\n", i + 1, up, down);
    }
    return 0;
}

11777 Automate the Grades.c

#include <stdio.h>

int main()
{
    int a, b, c, d, e, f, g, i, n, m, p, q, sum;

    while (scanf("%d", &n) == 1)
    {
        for (i = 1; i <= n; ++i)
        {
            scanf("%d %d %d %d %d %d %d", &a, &b, &c, &d, &e, &f, &g);
            p = (e > f) ? ((g > e) ? g : e) : ((g > f) ? g : f);
            q = (p == e) ? ((f > g) ? f : g) : ((p == f) ? ((e > g) ? e : g) : ((e > f) ? e : f));
            m = (p + q) / 2;
            sum = a + b + c + d + m;

            if (sum >= 90) printf("Case %d: A\n", i);
            else if (sum >= 80) printf("Case %d: B\n", i);
            else if (sum >= 70) printf("Case %d: C\n", i);
            else if (sum >= 60) printf("Case %d: D\n", i);
            else printf("Case %d: F\n", i);
        }
    }
    return 0;
}

11799 Horror Dash.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
    int n, i, j, a[50][10000], h[50], len[50];
    char ch;

    scanf("%d ", &n);

    for (i = 0; i < n; ++i)
    {
        h[i] = 0;
        ch = '0';
        for (j = 0; ch != '\n'; ++j)
        {
            scanf("%d", &a[i][j]);
            ch = getchar();
        }
        len[i] = j;

        for (j = 0; j < len[i]; ++j)
            if ( h[i] < a[i][j]) h[i] = a[i][j];
    }

    for (i = 0; i < n; ++i)
        printf("Case %d: %d\n", i+1, h[i]);
    return 0;
}