非官方题解 | 身份证验证

#include<bits/stdc++.h>
using namespace std;
long long sum=0;
long long z[20]={7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2};
long long m[15]={1,0,10,9,8,7,6,5,4,3,2};
string s;
int main(){
    cin>>s;
    for(long long i=0;i<17;i++){
        if(!(s[i]<='9'&&s[i]>='0')){
            cout<<"No";
            return 0;
        }
        else sum+=z[i]*(s[i]-'0');
    }
    sum%=11;
    sum=m[sum];
    if(sum==10&&s[17]=='X')cout<<"Yes";
    else if(sum==s[17]-'0')cout<<"Yes";
    else cout<<"No";
    return 0;
}