Submission #938373

#	Time	Username	Problem	Language	Result	Execution time	Memory
938373		ezzzay	Tracks in the Snow (BOI13_tracks)	C++14	2.19 / 100	629 ms	31960 KiB

tracks

#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();
}

• Subtask 1: 0 / 30
• Subtask 2: 2.1875 / 70