Cod sursa(job #2810512)

Utilizator NutaAlexandruASN49K NutaAlexandru Data 29 noiembrie 2021 16:17:28
Problema Struti Scor 10
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 2.7 kb
#include <bits/stdc++.h>

using namespace std;
const int N=1001;
int v[N][N],maxx[N][N],minn[N][N];
deque <int>dmax,dmin;
int dx,dy,x,y,val,nr;
void solve(int a,int b)
{
    for(int j=0;j<y;j++)
    {
        dmax.clear();
        dmin.clear();
        for(int i=0;i<x;i++)
        {
            if(!dmax.empty() && dmax.front()==i-a)
            {
                dmax.pop_front();
            }
            if(!dmin.empty() && dmin.front()==i-a)
            {
                dmin.pop_front();
            }
            while(!dmax.empty() && v[dmax.back()][j]<=v[i][j])
            {
                dmax.pop_back();
            }
            while(!dmin.empty() && v[dmin.back()][j]>=v[i][j])
            {
                dmin.pop_back();
            }
            dmax.push_back(i);
            dmin.push_back(i);
            if(i>=a-1)
            {
                maxx[i][j]=v[dmax.front()][j];
                minn[i][j]=v[dmin.front()][j];
            }

        }
    }


    /*for(int j=0;j<y;j++)
    {
        for(int i=a-1;i<x;i++)
        {
            cout<<minn[i][j]<<" ";
        }
        cout<<"\n";
    }
    */

    for(int i=a-1;i<x;i++)
    {
        dmax.clear();
        dmin.clear();
        for(int j=0;j<y;j++)
        {
            if(!dmax.empty() && dmax.front()==j-b)
            {
                dmax.pop_front();
            }
            if(!dmin.empty() && dmin.front()==j-b)
            {
                dmin.pop_front();
            }
            while(!dmax.empty() && maxx[i][j]>=maxx[i][dmax.front()])
            {
                dmax.pop_back();
            }
            while(!dmin.empty() && minn[i][j]<=minn[i][dmin.front()])
            {
                dmin.pop_back();
            }
            dmax.push_back(j);
            dmin.push_back(j);
            int diff=maxx[i][dmax.front()]-minn[i][dmin.front()];
            if(j>=b-1)
            {
                if(diff==val)
                {
                    nr++;
                }
                if(diff<val)
                {
                    nr=1;
                    val=diff;
                }
            }
        }
    }
}
int main()
{
    ios::sync_with_stdio(false);
    ifstream fin("struti.in");
    ofstream fout("struti.out");
    int n;
    fin>>y>>x>>n;
    for(int i=0;i<y;i++)
    {
        for(int j=0;j<x;j++)
        {
            fin>>v[j][i];
        }
    }
    for(int i=0;i<n;i++)
    {
        fin>>dx;
        fin>>dy;
        nr=0;
        val=N;
        solve(dx,dy);
        if(dx!=dy)
        {
            solve(dy,dx);
        }
        fout<<val<<" "<<nr<<"\n";
    }
    return 0;
}