80分求助大佬

#include <iostream>
using namespace std;
/*
Happy.Sun
*/
int n;
int m;
int month[13]={0,31,30,31,30,31,30,31,31,30,31,30,31};
int ans=0;
bool huiwen(int n){
    int y=n;
    int temp=0;
    while(y){
        temp*=10;
        temp+=y%10;
        y/=10;
    }
    if(temp==n) return 1;
    else  return 0;
}
int main(){
    cin>>n>>m;
    for(int i=n;i<=m;i++){
        if(!huiwen(i)) continue;
        int temp=i;
        int m=temp/100%100;
        if(m<=12&&month[m]>=temp%100){
            ans++;
        }
    }
    cout<<ans;
    return 0;
}