CCF篇：201509-2 日期计算

#include<iostream>
#include<algorithm>
using namespace std; 
int yearP[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
int yearR[12] = {31,29,31,30,31,30,31,31,30,31,30,31};
bool isRunYear(int year){
	bool flag = false;
	if(year%4==0&&year%100!=0){
		flag = true;
	}else if(year%400==0){
		flag = true;
	}
	return flag;
}
int sum(int a[], int index){
	int sum =0;
	for(int i=0;i<index;i++){
		sum+=a[i];
	}
	return sum;
}
int main(){
	int y,d;
	cin>>y>>d;
	
	if(isRunYear(y)){
		int sum_R = 0,month_R=-1,date_R=-1;
		for(int i=0;i<12;i++){
			sum_R+=yearR[i];
			if(sum_R>=d){
				month_R=i+1;
				date_R = d-sum(yearR,i);
				break;
			}
		}
		cout<<month_R<<endl;
		cout<<date_R<<endl;
	}else{
		int sum_P = 0,month_P=-1,date_P=-1;
		for(int i=0;i<12;i++){
			sum_P+=yearP[i];
			if(sum_P>=d){
				month_P=i+1;
				date_P = d-sum(yearP,i);
				break;
			}
		}
		cout<<month_P<<endl;
		cout<<date_P<<endl;
	}
	return 0;
}