[codeup 1928]日期差值 时间超限

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参考了算法笔记的程序，时间超限 有空再看看能不能更快。

#include<cstdio>
//#include<cmath> 
int month[13][2]={
(0,0),(31,31),(28,29),(31,31),(30,30),(31,31),(30,30),(31,31),(31,31),(30,30),(31,31),(30,30),(31,31)
};
bool isL(int x){
	return (x%4==0&&x%100!=0)||(x%400==0);
}
int main(void){
	int time1,y1,m1,d1;
	int time2,y2,m2,d2;
	while(scanf("%d %d",&time1,&time2)!=EOF){
		if(time1>time2){
			int temp=time1;
			time1=time2;
			time2=temp;
		}
		y1=time1/10000,m1=time1/100%100;d1=time1%100;
		y2=time2/10000,m2=time2/100%100;d2=time2%100;
		int ans=1;
		while(y1<y2||m1<m2||d1<d2){
			d1++;
			if(d1==month[m1][isL(y1)]+1){
				d1=1;
				m1++;
			}
			if(m1==13){
				y1++;
				m1=1;
			}
			ans++;
		}
		printf("%d\n",ans);
	}
	return 0;
}