一片紫光

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

int a,b,c;
char t;

int main()
{
    scanf ("%d-%d-%d-%c",a,b,c,t);
    int d = b / 100;
    int e = b / 10 % 10;
    int f = b % 10;
    int g = c / 10000;
    int h = c / 1000 % 10;
    int i = c / 100 % 10;
    int j = c / 10 % 10;
    int k = c % 10;
    int l = d * 2;
    int m = e * 3;
    int n = f * 4;
    int o = g * 5;
    int p = h * 6;
    int q = i * 7;
    int r = j * 8;
    int s = k * 9;
    int ans = a + l + m + n + o + p + q + r + s;
    int sum = ans % 11;
    if (sum == 10)
    printf ("%d-%d-%d-x",a,b,c);
    else
    printf ("%d-%d-%d-%d",a,b,c,sum);
    return 0;
}