Cod sursa(job #2676944)

Utilizator eu3neuomManghiuc Teodor-Florin eu3neuom Data 25 noiembrie 2020 15:14:59
Problema Struti Scor 90
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 3.2 kb
#include <bits/stdc++.h>
	
using namespace std;
	
const string FILENAME = "struti";	
ifstream fin(FILENAME + ".in");
ofstream fout(FILENAME + ".out");
	
const int NMax = 1050;

struct var {
    int val, x, y;
};
struct mydeque {
    int i, j;
    var v[NMax];

    mydeque() : i(0), j(0) {}

    void push_back(const var &other) {
        v[j] = other;
        ++j;
    }
    void pop_back() {
        --j;
    }
    void pop_front() {
        ++i;
    }
    bool empty() {
        return (i == j);
    }
    var front() {
        return v[i];
    }
    var back() {
        return v[j - 1];
    }
    void clear() {
        i = j = 0;
    }
};

int n, m;
int v[NMax][NMax];
mydeque mDQ[NMax], MDQ[NMax], mnD, mxD;

pair < int, int > Solve(int a, int b) {
    for (int i = 0; i < m; ++i) {
        mDQ[i].clear();
        MDQ[i].clear();
    }
    pair < int, int > ret = {INT_MAX, 0};

    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            while (!mDQ[j].empty() && mDQ[j].front().x <= i - a) {
                mDQ[j].pop_front();
            }
            while (!mDQ[j].empty() && v[i][j] <= mDQ[j].back().val) {
                mDQ[j].pop_back();
            }
            mDQ[j].push_back({v[i][j], i, j});

            while (!MDQ[j].empty() && MDQ[j].front().x <= i - a) {
                MDQ[j].pop_front();
            }
            while (!MDQ[j].empty() && v[i][j] >= MDQ[j].back().val) {
                MDQ[j].pop_back();
            }
            MDQ[j].push_back({v[i][j], i, j});
        }
        if (i >= a - 1) {
            mnD.clear();
            mxD.clear();
            for (int j = 0; j < m; ++j) {
                int mn = mDQ[j].front().val;
                int mx = MDQ[j].front().val;
                while (!mnD.empty() && mnD.front().y <= j - b) {
                    mnD.pop_front();
                }
                while (!mnD.empty() && mn <= mnD.back().val) {
                    mnD.pop_back();
                }
                mnD.push_back(mDQ[j].front());

                while (!mxD.empty() && mxD.front().y <= j - b) {
                    mxD.pop_front();
                }
                while (!mxD.empty() && mx >= mxD.back().val) {
                    mxD.pop_back();
                }
                mxD.push_back(MDQ[j].front());

                if (j >= b - 1) {
                    int dif = mxD.front().val - mnD.front().val;
                    if (ret.first > dif) {
                        ret = {dif, 1};
                    } else if (ret.first == dif) {
                        ++ret.second;
                    }
                }
            }
        }
    }
    return ret;
}

int main() {
    int q;
    fin >> n >> m >> q;

    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            fin >> v[i][j];
        }
    }

    while (q--) {
        int a, b; fin >> a >> b;

        pair < int, int > ord = Solve(a, b);      
        if (a != b) {
            pair < int, int > tmp = Solve(b, a);
            if (tmp.first < ord.first) {
                ord = tmp;
            } else if (tmp.first == ord.first) {
                ord.second += tmp.second;
            }
        }  
        fout << ord.first << " " << ord.second << "\n";
    }
    return 0;
}