Submission

Score: 0

User: eippy

Problemset: คิดถึงแม่

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-11 12:06:06

#include<iostream>
#include<cstring>
using namespace std;
int main(){
    char cnum[50];
    int digits[50];
    cin >> cnum;
    int len = strlen(cnum);
    for (int i=0; i<len-1; i++){
        digits[i] = cnum[i] - '0';
    }
    int digits_len = len - 1;
    for (int i=0; i<digits_len/2; i++){
        int temp = digits[digits_len-i-1];
        digits[digits_len-i-1] = digits[i];
        digits[i] = temp;
    }
    for (int i=0; i<digits_len; i++){
        if (i % 2 == 0){
            digits[i] *= 2;
        }
    }
    int ans[50];
    int k = 0;
    for (int i=0; i<digits_len; i++){
        if (digits[i] > 9){
            ans[k++] = digits[i]/10;
            ans[k++] = digits[i]%10;  
        } else {
            ans[k++] = digits[i];
        }
    }
    int R = 0, last_d;
    for (int i=0; i<k; i++){
       R += ans[i];
    }
    last_d = (10-(R%10))%10;
    int check_digit = cnum[len - 1] - '0';
    if (last_d == check_digit){
        cout << "yes";
    } else {
        cout << "no";
    }
    return 0;
}