제출 #938373

#제출 시각아이디문제언어결과실행 시간메모리
938373ezzzayTracks in the Snow (BOI13_tracks)C++14
2.19 / 100
629 ms31960 KiB
#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
const int N=4e3+2;
char arr[N][N];
signed main(){
    int n,m;
    cin>>n>>m;
    set<char>st;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>arr[i][j];
            if(arr[i][j]!='.')st.insert(arr[i][j]);
        }
    }
    cout<<st.size();
}
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