ZOJ-3600

无意间发现的水题，秒之

#include<cstdio>namespace{int prev(int d, int t){double res = t / 5.0 * 2;if (d <= 3)res += 10;else if (d <= 10)res += 10 + (d - 3) * 2;elseres += 24 + (d - 10) * 3;res += 1;return (int) (res + 0.5);}int now(int d, int t){double res = t / 4.0 * 2.5;if (d <= 3)res += 11;else if (d <= 10)res += 11 + (d - 3) * 2.5;elseres += 11 + 7 * 2.5 + (d - 10) * 3.75;return (int) (res + 0.5);}}int main(){int T, d, t;scanf("%d", &T);while (T--){scanf("%d %d", &d, &t);printf("%d\n", now(d, t) - prev(d, t));}return 0;}