fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int main() {
  4.     ios::sync_with_stdio(false);
  5.     cin.tie(nullptr);
  6.     freopen("MATMA.INP" , "r" , stdin);
  7.     freopen("MATMA.OUT" , "w" , stdout);
  8.     string s;
  9.     cin >> s;
  10.     vector<int> d;
  11.     int sum = 0;
  12.     bool hasZero = false;
  13.     for (char c : s) {
  14.         int x = c - '0';
  15.         d.push_back(x);
  16.         sum += x;
  17.         if (x == 0) hasZero = true;
  18.     }
  19.     if (!hasZero || sum % 3 != 0) {
  20.         cout << -1;
  21.         return 0;
  22.     }
  23.     sort(d.begin(), d.end(), greater<int>());
  24.     bool zeroUsed = false;
  25.     for (int x : d) {
  26.         if (x == 0 && !zeroUsed) {
  27.             zeroUsed = true;
  28.             continue;
  29.         }
  30.         cout << x;
  31.     }
  32.     cout << 0;
  33.     return 0;
  34. }
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin
copy 
123456789
stdout
copy 
-1
https://ideone.com/wWt5Bh
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!