UVA

 1 #include<iostream>
 2 using namespace std;
 3 int main()
 4 {
 5     int day;
 6     double height,down;
 7     double  H, U, D, F;
 8     while (cin >> H >> U >> D >> F)
 9     {
10         day =1;
11         height = 0;
12         if (H == 0 && U == 0 && D == 0 && F == 0)
13             break;
14         down = U*F / 100;
15         while (1)
16         {
17             if (U > 0)
18                 height += U;
19             if (height > H)
20             {
21                 cout << "success on day " << day << endl;
22                 break;
23             }
24             height -= D;  
25             if (height <0)
26             {
27                 cout << "failure on day " << day << endl;
28                 break;
29             }
30             U -= down;
31             ++day;
32         }
33     }
34     return 0;
35 }

 1 #include<stdio.h>
 2 int main()
 3 {
 4     double m,n,dis;
 5     int T,step,ans;
 6     bool flag;
 7     scanf("%d", &T);
 8     while (T--)
 9     {
10         scanf("%lf%lf", &m, &n);
11         dis = n - m;
12         step = 1;
13         flag = 0;
14         ans = 0;
15         while (dis > 0)
16         {
17             dis -= step;
18             ans++;
19             if (flag)
20                 ++step;
21             flag = !flag;
22         }
23         printf("%d\n",ans);
24     }
25     return 0;
26 }

 1 #include<stdio.h>
 2 int main()
 3 {
 4     double n;
 5     while (scanf("%lf", &n)!=EOF)
 6     {
 7         if (n < 0)
 8             return 0;
 9         if (n == 1)
10             printf("0%%\n");
11         else
12             printf("%.0lf%%\n", 25 * n);
13     }
14     return 0;
15 }

 1 #include<cstdio>
 2 #include<cmath>
 3 #include<iostream>
 4 using namespace std;
 5 int main()
 6 {
 7     long x, y, k,z;
 8     double t,i;
 9     while (scanf("%d", &x) && x != 0)
10     {
11         t = 0;
12         y = (x - 1960) / 10 + 2;
13         z = pow(2, y);
14         for (i = 1;; i++)
15         {
16             t += log10(i) / log10(2);
17             if (t>z)
18             {
19                 k = i - 1;
20                 break;
21             }
22         }
23         printf("%d\n", k);
24     }
25     return 0;
26 }

1 #include<stdio.h>
2 int main()
3 {
4     int m, n;
5     while (scanf("%d%d", &m, &n) != EOF)
6         printf("%d\n",(m-1)+m*(n-1));
7     return 0;
8 }

 1 #include<stdio.h>
 2 int main()
 3 {
 4     int T;
 5     int m, n;
 6     scanf("%d", &T);
 7     while (T--)
 8     {
 9         scanf("%d%d", &m, &n);
10         printf("%d\n", (m / 3)*(n / 3));
11     }
12     return 0;
13 }