冰冰手里有糖 @ 2019-11-04 22:58:30

cin>>n>>m;
year1=n/10000;
year2=m/10000;
for(i=year1;i<=year2;i++)    
{
    mon=i%10*10+i/10%10;
    days=i/100%10*10+i/1000;
    if(mon==2)  
    {
        if(((i%400==0||i%4==0&&i%100!=0)&&days<=29)||days<=28) ans++;    
    } 
    if((mon==1||mon==3||mon==5||mon==7||mon==8||mon==10||mon==12)&&days<=31) ans++;  
    else
    if((mon==4||mon==6||mon==9||mon==11)&&days<=30)  ans++;   
    //     if(i==year2){ if(m<year2*10000+mon*100+days) ans--;}
}
cout<<ans<<endl;  
return 0;     

by JRzyh @ 2019-11-12 17:44:08

#include<bits/stdc++.h>
using namespace std;

int n,m,i,year1,year2,mon,days,ans=0;

int main() {

cin>>n>>m;
year1=n/10000;
year2=m/10000;
for(i=year1;i<=year2;i++)    
{
    mon=i%10*10+i/10%10;
    days=i/100%10*10+i/1000;
    if(mon==2)  
    {
        if(((i%400==0||i%4==0&&i%100!=0)&&days<=29)||days<=28) ans++;    
    } 
    if((mon==1||mon==3||mon==5||mon==7||mon==8||mon==10||mon==12)&&days<=31) ans++;  
    else
    if((mon==4||mon==6||mon==9||mon==11)&&days<=30)  ans++;   
    //     if(i==year2){ if(m<year2*10000+mon*100+days) ans--;}
}
cout<<ans<<endl;  
return 0;     
} 

为什么我加了注释的一行就wa了？？（不加就100分加了就30分） 如果是20011000 20011001 不应该是0而不是1吗？