Submission #921753

#	Time	Username	Problem	Language	Result	Execution time	Memory
921753		vjudge1	Collecting Mushrooms (NOI18_collectmushrooms)	C++17	60 / 100	2098 ms	52560 KiB

mushrooms

#include <bits/stdc++.h>
#include <iomanip>
#define ll long long
//#define int long long
#define pb push_back
#define F first
#define S second
#define st string
#define sz(x) x.size()
#define all(x) x.begin(), x.end()
#define vi vector<int>
#define mii map<int,int>
#define mll map<ll,ll>
#define YES cout<<"YES\n";
#define NO cout<<"NO\n";
#define yes cout<<"Yes\n";
#define no cout<<"No\n";
#define lf else if 
using namespace std;

void why(){
    ll n,m,d,k,ans=0,ms=0,sm=0;
    cin>>n>>m>>d>>k;
    char v[n+7][m+7];
    map <pair<ll,ll>,ll> mp;
    map <pair<ll,ll>,ll> bp;
    ll f[n+7][m+7];
    for(ll i=1;i<=n;i++)
    {
        for(ll j=1;j<=m;j++)
        {
            cin>>v[i][j];
            f[i][j]=0;
            if(v[i][j]=='M')mp[{i,j}]+=1;
            lf(v[i][j]=='S')bp[{i,j}]+=1;
        }
    }
    for(auto to : bp)
    {
        for(auto it : mp)
        {
            if(it.F.F>to.F.F)ms=it.F.F-to.F.F;
            else ms=to.F.F-it.F.F;
            if(it.F.S>to.F.S)sm=it.F.S-to.F.S;
            else sm=to.F.S-it.F.S;
            if(ms<=d && sm<=d)
            {
                f[it.F.F][it.F.S]+=1;
                if(f[it.F.F][it.F.S]==k)ans++;
            }
        }
    }
    cout<<ans;
}
signed main(){
    ios_base::sync_with_stdio(0),cin.tie(0);
    //srand( time(0));
    //freopen("sum.in", "r", stdin);
    //freopen("sum.out", "w", stdout);
    ll tests=1;
    //cin>>tests;
    for(ll i=1;i<=tests;i++)
    {
        //cout<<"Case "<<i<<":\n";
        why();
    }
}

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 18 / 18
• Subtask 4: 23 / 23
• Subtask 5: 0 / 19
• Subtask 6: 0 / 21