Mother's Day

https://ac.nowcoder.com/acm/contest/554/E

题解：朴素

/*
*@Author:   STZG
*@Language: C++
*/
#include <bits/stdc++.h>
#include<iostream>
#include<algorithm>
#include<cstdlib>
#include<cstring>
#include<cstdio>
#include<string>
#include<vector>
#include<bitset>
#include<queue>
#include<deque>
#include<stack>
#include<cmath>
#include<list>
#include<map>
#include<set>
//#define DEBUG
#define RI register int
#define endl "\n"
using namespace std;
typedef long long ll;
//typedef __int128 lll;
const int N=100000+10;
const int M=100000+10;
const int MOD=1e9+7;
const double PI = acos(-1.0);
const double EXP = 1E-8;
const int INF = 0x3f3f3f3f;
int t,n,m,k,p,l,r,u,v;
int ans,cnt,flag,temp,sum;
int a,b,c,y;
char str;
struct node{};
bool check(int y){return y%4==0&&y%100!=0||y%400==0;
}
int mo[2][13]={{0,31,28,31,30,31,30,31,31,30,31,30,31},{0,31,29,31,30,31,30,31,31,30,31,30,31}};
int main()
{
#ifdef DEBUGfreopen("input.in", "r", stdin);//freopen("output.out", "w", stdout);
#endif//ios::sync_with_stdio(false);//cin.tie(0);//cout.tie(0);//scanf("%d",&t);//while(t--){while(~scanf("%d%d%d%d",&a,&b,&c,&y)){int week=1;int num=1;ans=0;int year,month,day;for(int i=1850;i<=y;i++){int f=check(i);for(int j=1;j<=12;j++){num=0;for(int k=1;k<=mo[f][j];k++){week++;if(week>7)week=1;if(week==c)num++;if(i==y&&j==a&&b==num&&week==c){ans=1;year=i;month=j;day=k;break;}}}}if(ans){printf("%d/",year);if(month<10)printf("0%d/",month);elseprintf("%d/",month);if(day<10)printf("0%d\n",day);elseprintf("%d\n",day);}else{cout<<"none"<<endl;}}//}#ifdef DEBUGprintf("Time cost : %lf s\n",(double)clock()/CLOCKS_PER_SEC);
#endif//cout << "Hello world!" << endl;return 0;
}

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