Submission #19479970

---

Source Code Expand

#include<bits/stdc++.h>
using namespace std;
#define rep(i, N) for(int i = 0; i < (int)N; i++)

int main(){
    int N, max = 0, tmp = 0;
    string S;
    cin >> N >> S;
    map<char, int> X, Y;
    rep(i, N) Y[S.at(i)]++;
    rep(i, N){
        X[S.at(i)]++;
        Y[S.at(i)]--;
        tmp = 0;
        for(auto x : X)
            if(x.second > 0 && Y.at(x.first) > 0) tmp++;
        if(max < tmp) max = tmp; 
    }
    cout << max << endl;
}

Submission Info

Judge Result