oj.uz

Submission #750385

# Submission time Handle Problem Language Result Execution time Memory
750385 2023-05-29T12:57:38 Z pcc The Kingdom of JOIOI (JOI17_joioi) C++14
0 / 100
 1 ms 340 KB 
#include <bits/stdc++.h>
using namespace std;

const int mxn = 2022;
int arr[mxn][mxn],lim[mxn];
int n,m;
int small = 1e9+10;

bool calc(int d){
	for(lim[1] = 1;lim[1]<=m&&arr[1][lim[1]]<=small+d;lim[1]++);
	for(int i = 2;i<=n;i++){
		for(lim[i] = 1;lim[i]<lim[i-1]&&arr[i][lim[i]]<=small+d;lim[i]++);
	}
	int big = 0,small = 1e9;
	for(int i = 1;i<=n;i++){
		for(int j = m;j>=lim[i];j--)big = max(big,arr[i][j]),small = min(small,arr[i][j]);
	}
	return big-small<=d;
}

bool f(int d){
	bool flag = false;
	flag = calc(d);
	reverse(arr+1,arr+n+1);
	flag = flag||calc(d);
	return flag;
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>n>>m;
	int big = 0;
	for(int i = 1;i<=n;i++)
		for(int j = 1;j<=m;j++)cin>>arr[i][j],big = max(big,arr[i][j]),small = min(small,arr[i][j]);
	int l = 0,r = big;
	while(l != r){
		int mid = (l+r)>>1;
		if(f(mid))r = mid;
		else l = mid+1;
	}
	cout<<l;
}

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -