Submission #65424652

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Source Code Expand

#include <bits/stdc++.h>
#include <atcoder/all>

using namespace std;
using namespace atcoder;

#define overload4(_1, _2, _3, _4, name, ...) name
#define rep1(n) for(int i = 0; i < (int)(n); ++i)
#define rep2(i, n) for(int i = 0; i < (int)(n); ++i)
#define rep3(i, a, b) for(int i = (a); i < (int)(b); ++i)
#define rep4(i, a, b, c) for(int i = (a); i < (int)(b); i += (c))
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)

#define Sort(a) sort(a.begin(), a.end())
#define RSort(a) sort(a.rbegin(), a.rend())
 
typedef long long int ll;
typedef unsigned long long ull;
typedef long double ld;

typedef vector<int> vi;
typedef vector<char> vcr;
typedef vector<long long> vll;
typedef vector<long double> vld;
typedef vector<string> vst;

const ll INF = 0x1fffffffffffffff;
const ll MOD = 998244353;
const ll ZERO = 0;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

template<typename T> istream &operator>>(istream &is, vector<T> &v){ for(T &in : v) is >> in; return is; }
template<typename T> ostream &operator<<(ostream &os, const vector<T> &v){ for(int i = 0; i < (int) v.size(); ++i){ os << v[i] << (i + 1 != (int) v.size() ? " " : ""); } return os; }

template<class... T> void in(T&... a){ (cin >> ... >> a); }
void out(){ cout << '\n'; }
template<class T, class... Ts> void out(const T& a, const Ts&... b){ cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; }

int main(){
    string s;
    in(s);
    map<char, ll> mp; //<キー、値>
    vll t(26);
    rep(i,s.size()){
        t[s[i] - 'a'] = 1;
    }
    rep(i,26){
        if(t[i] == 0){
            cout << (char)('a' + i);
            return 0;
        }
    }
}

Submission Info

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