Submission

Status:

[PPPPPPPPPP]

Score: 100

User: Namkhing

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.002 second

Submitted On: 2025-04-10 23:45:14

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


int main() {
    cin.tie(nullptr)->ios_base::sync_with_stdio(false);
    string s;
    cin >> s;
    int x = s.back() - '0';
    s.pop_back();
    reverse(s.begin(), s.end());
    int ans = 0;
    for (int i = 0; i < s.size(); i++) {
        if (i % 2 == 0) {
            int val = s[i] - '0';
            val *= 2;
            if (val >= 10) ans += val - 9;
            else ans += val;
        }
        else {
            ans += s[i] - '0';
        }
    }
    int r = (10 - ans % 10) % 10;
    if (r == x) cout << "yes";
    else cout << "no";
}