Submission #1982739

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Source Code Expand

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

int main(){
    string s;
    cin >> s;
    vector<bool> used(26, false);
    bool success = true;;
    for(int i=0; i<(int)s.length(); i++){
        if(used[s[i]-'a']){
            success = false;
            break;
        }
        used[s[i]-'a'] = true;
    }
    if(success){
        cout << "yes" << endl;
    }else{
        cout << "no" << endl;
    }
    return 0;
}

Submission Info

Judge Result