51假期当然不能空着，得逼着队友一起训练。然而队友手感挺好的，我却不是很在状态。
把简单的题都切了，剩下的都是通过人数个位数的神仙题。
题目链接：http://codeforces.com/gym/102190
A：
签到题。根据长度暴力塞进去就好了。
1 /* basic header */ 2 #include <iostream> 3 #include <cstdio> 4 #include <cstdlib> 5 #include <string> 6 #include <cstring> 7 #include <cmath> 8 #include <cstdint> 9 #include <climits> 10 #include <float.h> 11 /* STL */ 12 #include <vector> 13 #include <set> 14 #include <map> 15 #include <queue> 16 #include <stack> 17 #include <algorithm> 18 #include <array> 19 #include <iterator> 20 /* define */ 21 #define ll long long 22 #define dou double 23 #define pb emplace_back 24 #define mp make_pair 25 #define fir first 26 #define sec second 27 #define sot(a,b) sort(a+1,a+1+b) 28 #define rep1(i,a,b) for(int i=a;i<=b;++i) 29 #define rep0(i,a,b) for(int i=a;i<b;++i) 30 #define repa(i,a) for(auto &i:a) 31 #define eps 1e-8 32 #define int_inf 0x3f3f3f3f 33 #define ll_inf 0x7f7f7f7f7f7f7f7f 34 #define lson curPos<<1 35 #define rson curPos<<1|1 36 /* namespace */ 37 using namespace std; 38 /* header end */ 39 40 const int maxn = 10; 41 char s[maxn]; 42 43 int main() 44 { 45 scanf("%s", s + 1); 46 int len = strlen(s + 1); 47 int sh = 0, th = 0, day; 48 if (len == 3) 49 { 50 sh = s[1] - '0'; th = 12 + s[2] - '0'; day = s[3] - '0'; 51 } 52 else if (len == 5) 53 { 54 sh = (s[1] - '0') * 10 + s[2] - '0'; 55 th = 12 + (s[3] - '0') * 10 + s[4] - '0'; 56 day = s[5] - '0'; 57 } 58 else 59 { 60 sh = (s[1] - '0') * 10 + s[2] - '0'; 61 th = 12 + s[3] - '0'; 62 day = s[4] - '0'; 63 if ((sh < 2 || sh > 11) || (th < 14 || th > 23)) 64 { 65 sh = s[1] - '0'; 66 th = 12 + (s[2] - '0') * 10 + s[3] - '0'; 67 } 68 } 69 printf("%d\n", day * (th - sh)); 70 return 0; 71 }