oj.uz

Submission #484707

# Submission time Handle Problem Language Result Execution time Memory
484707 2021-11-05T07:52:10 Z Haruto810198 The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 729 ms 187576 KB 
#include <bits/stdc++.h>

using namespace std;

#define int long long
#define double long double

#define FOR(i, l, r, d) for(int i=(l); i<=(r); i+=(d))
#define szof(x) ((int)(x).size())

#define vi vector<int>
#define pii pair<int, int>

#define F first
#define S second

#define pb push_back
#define eb emplace_back
#define mkp make_pair

const int INF = 2147483647;
const int LNF = INF*INF;
const int MOD = 1000000007;
const int mod = 998244353;
const double eps = 1e-12;

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

const int MAX = 2010;

int n, m;
int arr[MAX][MAX];
int pmax[MAX][MAX], pmin[MAX][MAX], smax[MAX][MAX], smin[MAX][MAX];
int gmax, gmin;

bool check(int lmin, int lmax, int rmin, int rmax){
	
	//bool owo = 0;
	//if(lmin == 5 and lmax == 23 and rmin == 10 and rmax == 28) owo = 1;
	
	bool ret = 0;
	
	int ptr = m;
	int curmin = INF, curmax = -INF;
	FOR(i, 1, n, 1){
		while(pmin[i][ptr] < lmin or lmax < pmax[i][ptr]){
			ptr--;
			assert(ptr >= 0);
		}
		curmin = min(curmin, smin[i][ptr + 1]);
		curmax = max(curmax, smax[i][ptr + 1]);
		//if(owo) cerr<<"i = "<<i<<" : ptr = "<<ptr<<endl;
	}
	
	if(rmin <= curmin and curmax <= rmax) ret = 1;
	
	ptr = m;
	curmin = INF, curmax = -INF;
	for(int i = n; i >= 1; i--){
		while(pmin[i][ptr] < lmin or lmax < pmax[i][ptr]){
			ptr--;
			assert(ptr >= 0);
		}
		curmin = min(curmin, smin[i][ptr + 1]);
		curmax = max(curmax, smax[i][ptr + 1]);
		//if(owo) cerr<<"i = "<<i<<" : ptr = "<<ptr<<endl;
	}

	if(rmin <= curmin and curmax <= rmax) ret = 1;
	
	return ret;

}

bool CHECK(int T){
	return (check(gmin, gmin + T, gmax - T, gmax) or check(gmax - T, gmax, gmin, gmin + T));
}

signed main(){

    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
	
	cin>>n>>m;
	FOR(i, 1, n, 1){
		FOR(j, 1, m, 1){
			cin>>arr[i][j];
		}
	}
	
	//cerr<<"ok"<<endl;
	
	gmax = -INF;
	gmin = INF;
	FOR(i, 1, n, 1){
		pmax[i][0] = -INF;
		pmin[i][0] = INF;
		FOR(j, 1, m, 1){
			pmax[i][j] = max(pmax[i][j-1], arr[i][j]);
			pmin[i][j] = min(pmin[i][j-1], arr[i][j]);
			gmax = max(gmax, arr[i][j]);
			gmin = min(gmin, arr[i][j]);
		}
		
		smax[i][m+1] = -INF;
		smin[i][m+1] = INF;
		for(int j = m; j >= 1; j--){
			smax[i][j] = max(smax[i][j+1], arr[i][j]);
			smin[i][j] = min(smin[i][j+1], arr[i][j]);
		}
	}
	
	//cerr<<"ok"<<endl;

	int L = 0, R = gmax - gmin, mid;
	while(L < R){
		mid = (L + R) / 2;
		if(CHECK(mid)) R = mid;
		else L = mid + 1;
		//cerr<<"CHECK("<<mid<<") = "<<CHECK(mid)<<endl;
	}
	
	cout<<L<<'\n';
	
    return 0;

}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 500 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 0 ms 460 KB Output is correct
6 Correct 0 ms 460 KB Output is correct
7 Correct 0 ms 460 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 448 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 0 ms 460 KB Output is correct
14 Correct 0 ms 460 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 500 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 0 ms 460 KB Output is correct
6 Correct 0 ms 460 KB Output is correct
7 Correct 0 ms 460 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 448 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 0 ms 460 KB Output is correct
14 Correct 0 ms 460 KB Output is correct
15 Correct 1 ms 588 KB Output is correct
16 Correct 7 ms 5836 KB Output is correct
17 Correct 6 ms 6120 KB Output is correct
18 Correct 6 ms 6092 KB Output is correct
19 Correct 6 ms 6096 KB Output is correct
20 Correct 6 ms 5452 KB Output is correct
21 Correct 7 ms 6224 KB Output is correct
22 Correct 7 ms 6236 KB Output is correct
23 Correct 9 ms 6220 KB Output is correct
24 Correct 8 ms 5580 KB Output is correct
25 Correct 7 ms 6220 KB Output is correct
26 Correct 7 ms 6220 KB Output is correct
27 Correct 10 ms 6220 KB Output is correct
28 Correct 7 ms 6220 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 500 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 0 ms 460 KB Output is correct
6 Correct 0 ms 460 KB Output is correct
7 Correct 0 ms 460 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 448 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 0 ms 460 KB Output is correct
14 Correct 0 ms 460 KB Output is correct
15 Correct 1 ms 588 KB Output is correct
16 Correct 7 ms 5836 KB Output is correct
17 Correct 6 ms 6120 KB Output is correct
18 Correct 6 ms 6092 KB Output is correct
19 Correct 6 ms 6096 KB Output is correct
20 Correct 6 ms 5452 KB Output is correct
21 Correct 7 ms 6224 KB Output is correct
22 Correct 7 ms 6236 KB Output is correct
23 Correct 9 ms 6220 KB Output is correct
24 Correct 8 ms 5580 KB Output is correct
25 Correct 7 ms 6220 KB Output is correct
26 Correct 7 ms 6220 KB Output is correct
27 Correct 10 ms 6220 KB Output is correct
28 Correct 7 ms 6220 KB Output is correct
29 Correct 347 ms 171916 KB Output is correct
30 Correct 348 ms 179132 KB Output is correct
31 Correct 379 ms 180544 KB Output is correct
32 Correct 396 ms 180704 KB Output is correct
33 Correct 297 ms 158428 KB Output is correct
34 Correct 373 ms 180812 KB Output is correct
35 Correct 729 ms 179156 KB Output is correct
36 Correct 576 ms 187576 KB Output is correct
37 Correct 585 ms 179140 KB Output is correct