奶牛的生日 C++ AC

这个水题总记得好像在哪里看过但就是想不起来于是就重做了一遍......

#include <cstdio>#include <cstring>#include <iostream>#include <algorithm>using namespace std;int y,m,d,x[20001];int q2[12]={31,28,31,30,31,30,31,31,30,31,30,31};string q[7]={"sunday","monday","tuesday","wednesday","thursday","friday","saturday"};bool pd(int i){if (i%400==0)return 1;if (i%100==0)return 0;if (i%4==0)return 1;return 0;}int main(){cin>>y>>m>>d;int ans=(d-1)%7;x[1800]=3;for (int i=1801;i<=20000;i++){if (pd(i-1))x[i]=(x[i-1]+2)%7;else x[i]=(x[i-1]+1)%7;}if (pd(y))q2[1]=29;for (int i=1;i<m;i++)ans=(ans+q2[i-1])%7;cout<<q[(x[y]+ans)%7]<<endl;return 0;}

忘了加注释了明天再补，今天再做一题