Submission #234370

#	Time	Username	Problem	Language	Result	Execution time	Memory
234370		aloo123	Tracks in the Snow (BOI13_tracks)	C++14	2.19 / 100	337 ms	16120 KiB

tracks

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define in insert
#define vll vector<ll>
#define endl "\n"
#define pll pair<ll,ll>
#define all(x) (x).begin() , (x).end()
#define f first
#define s second
#define pr(x) cout<<x<<endl;
#define pr2(x,y) cout<<x<<" "<<y<<endl;
#define pr3(x,y,z) cout<<x<<" "<<y<<endl;
#define prv(v) for(auto x:v) cout<<x<<" ";
#define ffs fflush(stdout);
#define int ll
#define sz(x) (ll)x.size()
using namespace std;
 

const ll MOD = 1e9+7;
const ll INF = 1e9;
const ll LOG = 29;
#define PI 3.141592653589793238 
 
 
long long binpow(long long a, long long b) {
     a%=MOD;    
    long long res = 1;
    while (b > 0) {
        if (b & 1)
            res = (res * a);
        a = (a * a);
 
        
        b >>= 1;
    }
     res%=MOD;
    return res;
}

const ll N =(1e6+5);
char grid[4005][4005];
void solve(){
    ll n,m;
    cin>>n>> m;
    set<char> se;
    for(int i = 1;i<= n;i++){
        for(int j = 1;j <= m;j++){
            char c;
            cin >> c;
            if(c == '.') continue;
            se.in(c);
        }
    }
    cout<<sz(se)<<endl;
}   

   




 
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    
       

    ll t=1;
   //cin>>t;
    while(t--){
        solve();
    }    
     
}

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