Submission #3908591

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Source Code Expand

#include <bits/stdc++.h>
#define repd(i,a,b) for (int i=(a);i<(b);i++)
#define rep(i,n) repd(i,0,n)
typedef long long ll;
using namespace std;
const int MOD = 1000000007;
const int INF = 1010000000;
const double EPS = 1e-10;
const array<pair<int,int>,4> fd{make_pair(1,0),make_pair(-1,0),make_pair(0,1),make_pair(0,-1)}; 

int main(){
  string a;cin>>a;
  if(a == "a"){
    cout << -1 << endl;
    return 0;
  }
  cout << a[0] << endl;
}

Submission Info

Judge Result