Submission #386356

#	Time	Username	Problem	Language	Result	Execution time	Memory
386356		ritul_kr_singh	The Kingdom of JOIOI (JOI17_joioi)	C++17	0 / 100	1 ms	364 KiB

joioi

#pragma GCC optimize("Ofast,unroll-loops")

#include <bits/stdc++.h>
using namespace std;
// #define int long long
#define nl << '\n'
#define sp << ' ' <<

int h, w;
int g[2000][2000], a[2000], maxElement, minElement;

bool possible(int diff){
	int res = 0;
	for(int i=0; i<h; ++i){
		a[i] = 0;
		for(int j=0; j<w; ++j){
			if(g[i][j]-minElement<=diff and a[i]==j) ++a[i];
			else res = max(res, maxElement-g[i][j]);
		}
	}
	return res<=diff;
}

int search(){
	int res = maxElement - minElement;
	int low = 0, high = res;
	while(low<high){
		int mid = (low+high)/2;
		if(possible(mid)) high = mid;
		else low = mid+1;
	}
	return low;
}

void rotate(){
	int g0[h][w];
	for(int i=0; i<h; ++i)
		for(int j=0; j<w; ++j)
			g0[i][j] = g[i][j];
	swap(h, w);
	for(int i=0; i<h; ++i)
		for(int j=0; j<w; ++j)
			g[i][j] = g0[j][w-1-i];
}

signed main(){
	cin.tie(0)->sync_with_stdio(0);

	cin >> h >> w;
	for(int i=0; i<h; ++i)
		for(int j=0; j<w; ++j)
			cin >> g[i][j];
	int ans = 2e9;


	maxElement = minElement = g[0][0];
	for(int i=0; i<h; ++i)
		for(int j=0; j<w; ++j)
			maxElement = max(maxElement, g[i][j]), minElement = min(minElement, g[i][j]);

	for(int _=0; _<4; ++_){
		if(_) rotate();
		ans = min(ans, search());
	}

	cout << ans;
}

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