ID

input/code.cpp: In function 'int main()':
input/code.cpp:26:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for (int j=0; ok && j<gg.size(); ++j){
                                     ^

#include <iostream>
#include <vector>
using namespace std;

vector<int> gg;


int df(int a, int b){
  int df=0;
  while (a || b){
    df+=(a%10 != b%10);
    a/=10;
    b/=10;
  }
  return df;
}

int main(){
  int n;
  cin >> n;
  int c=0;
  for (int i=0; i<n; ++i){
    bool ok=0;
    for (; !ok; ++c){
      ok=1;
      for (int j=0; ok && j<gg.size(); ++j){
	if (df(gg[j], c)<2) ok=0;
      }  
    }--c;
    gg.push_back(c);
  }
  string ans="";
  for (int i=0; i<10; ++i){
    ans=(char)((gg[n-1]%10)+'0')+ans;
    gg[n-1]/=10;
  }
  cout << ans << "\n";
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED