Submission #1995838

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Source Code Expand

#include<iostream>
#include<string>
#include<vector>
#include<math.h>
#include<map>
#include<algorithm>
#include<set>
#define rep(i,N) for(int i=0;i<(N);i++)
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
using namespace std;
const long long MOD = 1e9 + 7;
const long long INF = 1e12;
int main(void){
    int n,count=0;
    string s;
    cin>>s;
    vector<int> v(26,0);
    rep(i,s.size()) v[s[i]-'a']++;
    int c=100;
    rep(i,26){
        if(v[i]==0){
            c=i;
            break;
        }
    }
    char a=3;
    if(c!=100){
        a=c+'a';
        cout<<a<<endl;
    }
    else {
        cout<<"None"<<endl;
    }    
    return 0;
}

Submission Info

Judge Result