Submission #1120260

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120260		vjudge1	Tracks in the Snow (BOI13_tracks)	C++17	0 / 100	220 ms	20028 KiB

tracks

#include <bits/stdc++.h>

using namespace std;

#define int long long

const int sz=2e5+5;

const int INF=1e18;

const int MOD=1e9+7;

char arr[5000][5000];

map<char,int> mp;

void solve()
{
    int n,m;
    
    cin>>n>>m;
    
    for(int i=0;i<n;i++)
        for(int j=0;j<m;j++)
            cin>>arr[i][j];
    
    for(int i=0;i<n;i++)
        for(int j=0;j<m;j++)
            mp[arr[i][j]]++;
    
    cout<<mp.size()-1;
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int t=1;
    
    //cin>>t;
    
    while(t--)
    {
        solve();
    }
}

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