Submission #1319321

#	Time	Username	Problem	Language	Result	Execution time	Memory
1319321		djsksbrbf	Tracks in the Snow (BOI13_tracks)	C++20	2.19 / 100	191 ms	16112 KiB

tracks

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair <ll, ll> pii;
#define fi first
#define se second
#define pb push_back
const int MOD = 1e9 + 7;
const int MAX = 2e5 + 5;
const int dx[4] = {0, 0, 1, -1};
const int dy[4] = {1, -1, 0, 0};
#define int ll

signed main(){
   ios_base::sync_with_stdio(0);
   cin.tie(0);
   
   int n, m; cin >> n >> m;
   char a[n + 5][m + 5];
   for(int i = 1 ; i <= n ; i++){
      for(int j = 1 ; j <= m ; j++){
         cin >> a[i][j];
      }
   }
   
   set <int> s;
   for(int i = 1 ; i <= n ; i++){
      for(int j = 1 ; j <= m ; j++){
         if(a[i][j] == '.')continue;
         s.insert(a[i][j]);
      }
      
   }
   cout << s.size() << endl;
   
   return 0;
}

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