Submission #837168

#	Time	Username	Problem	Language	Result	Execution time	Memory
837168		_martynas	The Kingdom of JOIOI (JOI17_joioi)	C++11	15 / 100	4027 ms	464 KiB

joioi

#include <bits/stdc++.h>

using namespace std;

const int mxn = 2005;
const int inf = 2e9;

int h, w;
int a[mxn][mxn];
int best = inf;

vector<int> heights;
void recur() {
    if(heights.size() == w) {
        // if(count(heights.begin(), heights.end(), 0) == w) return;
        // if(count(heights.begin(), heights.end(), h) == w) return;
        int ioimx = 0, ioimn = inf/2, joimx = 0, joimn = inf/2;
        for(int i = 0; i < h; i++) {
            for(int j = 0; j < w; j++) {
                if(i < heights[j]) {
                    ioimx = max(ioimx, a[i][j]);
                    ioimn = min(ioimn, a[i][j]);
                }
                else {
                    joimx = max(joimx, a[i][j]);
                    joimn = min(joimn, a[i][j]);
                }
            }
        }
        best = min(best, max(ioimx-ioimn, joimx-joimn));
        return;
    }
    for(int i = (heights.empty() ? 0 : heights.back()); i <= h; i++) {
        heights.push_back(i);
        recur();
        heights.pop_back();
    }
}

int main(int argc, char const *argv[]) {
    cin >> h >> w;
    for(int i = 0; i < h; i++) {
        for(int j = 0; j < w; j++) {
            cin >> a[i][j];
        }
    }
    recur();
    for(int i = 0; i < h; i++) reverse(a[i], a[i]+w);
    recur();
    cout << best << "\n";
    return 0;
}

Compilation message (stderr)

joioi.cpp: In function 'void recur()':
joioi.cpp:14:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   14 |     if(heights.size() == w) {
      |        ~~~~~~~~~~~~~~~^~~~

• Subtask 1: 15 / 15
• Subtask 2: 0 / 45
• Subtask 3: 0 / 40