Submission #649589

#	Time	Username	Problem	Language	Result	Execution time	Memory
649589		ShahdMohamed	Collecting Mushrooms (NOI18_collectmushrooms)	C++17	100 / 100	97 ms	12520 KiB

mushrooms

///LW M4 ACC HAZ3L GAMED
///YARAB WALA...I MEAN YARAB ACC
#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define endl "\n"
const ll mod = (ll) 1e9 + 7;
const ll even = (ll) 1e9 + 2;
const ll oo= (ll) 1e16;
using namespace std;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    ll n,m,x,y;
    cin>>n>>m>>x>>y;
    vector<vector<char>>v(n,vector<char>(m));
    for (ll i=0; i<n; i++)
    {
        for (ll j=0; j<m; j++)
            cin>>v[i][j];
    }

    vector<vector<ll>>frq(n+1,vector<ll>(m+1));
    for (ll i=0; i<n; i++)
    {
        for (ll j=0; j<m; j++)
        {
            if (v[i][j]=='.' or v[i][j]=='M')continue;
            if (n<m)
            {
                for (ll k=max(0ll,i-x); k<=min(n-1,i+x); k++)
                {
                    frq[k][max(j-x,0ll)]++;
                    frq[k][min(j+x+1,m)]--;
                }
            }
            else
            {
                for (ll k=max(0ll,j-x); k<=min(m-1,j+x); k++)
                {
                    frq[max(i-x,0ll)][k]++;
                    frq[min(i+x+1,n)][k]--;
                }
            }
        }
    }
    if (n<m)
    {
        for (ll i=0; i<n; i++)
        {
            for (ll j=1; j<m; j++)
                frq[i][j]+=frq[i][j-1];
        }
    }
    else
    {
        for (ll i=1; i<n; i++)
        {
            for (ll j=0; j<m; j++)
                frq[i][j]+=frq[i-1][j];
        }
    }
    ll ans=0;
    for (ll i=0; i<n; i++)
    {
        for (ll j=0; j<m; j++)
        {
            if (v[i][j]=='M' and frq[i][j]>=y)ans++;
        }
    }
    cout<<ans<<endl;

    return 0;
}

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