oj.uz

Submission #647575

# Submission time Handle Problem Language Result Execution time Memory
647575 2022-10-03T08:26:37 Z ymm The Kingdom of JOIOI (JOI17_joioi) C++17
60 / 100
 4000 ms 189692 KB 
#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;

const int N = 2048;
int a[N][N];
int n, m;

int len[N];

bool can_extend(int i, int mx)
{
	if (i > 0 && len[i-1] <= len[i])
		return 0;
	if (len[i] == m || a[i][len[i]] > mx)
		return 0;
	return 1;
}

int solve()
{
	multiset<int> s1, s2;
	vector<pair<int,int>> alts;
	memset(len, 0, sizeof(len));
	Loop (i,0,n) Loop (j,0,m) {
		alts.push_back({a[i][j], i});
		s2.insert(a[i][j]);
	}
	sort(alts.begin(), alts.end());
	int ans = 2e9;
	for (auto [mx, row] : alts) {
		Loop (r,row,n) {
			if (!can_extend(r, mx))
				break;
			while (can_extend(r, mx)) {
				s1.insert(a[r][len[r]]);
				s2.erase(s2.find(a[r][len[r]]));
				len[r]++;
			}
		}
		if (s1.empty() || s2.empty())
			continue;
		ans = min(ans, max(*s1.rbegin() - *s1.begin(),
		                   *s2.rbegin() - *s2.begin()));
	}
	return ans;
}

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	cin >> n >> m;
	Loop (i,0,n) Loop (j,0,m)
		cin >> a[i][j];
	int ans = 2e9;
	ans = min(ans, solve());
	Loop (i,0,n/2) Loop (j,0,m)
		swap(a[i][j], a[n-1-i][j]);
	ans = min(ans, solve());
	Loop (i,0,n) Loop (j,0,m/2)
		swap(a[i][j], a[i][m-1-j]);
	ans = min(ans, solve());
	Loop (i,0,n/2) Loop (j,0,m)
		swap(a[i][j], a[n-1-i][j]);
	ans = min(ans, solve());
	cout << ans << '\n';
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 6 ms 460 KB Output is correct
16 Correct 95 ms 3284 KB Output is correct
17 Correct 118 ms 3920 KB Output is correct
18 Correct 126 ms 3944 KB Output is correct
19 Correct 115 ms 4096 KB Output is correct
20 Correct 107 ms 3580 KB Output is correct
21 Correct 127 ms 4036 KB Output is correct
22 Correct 111 ms 3940 KB Output is correct
23 Correct 125 ms 4088 KB Output is correct
24 Correct 95 ms 3648 KB Output is correct
25 Correct 123 ms 4208 KB Output is correct
26 Correct 144 ms 3952 KB Output is correct
27 Correct 121 ms 4184 KB Output is correct
28 Correct 121 ms 4152 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 6 ms 460 KB Output is correct
16 Correct 95 ms 3284 KB Output is correct
17 Correct 118 ms 3920 KB Output is correct
18 Correct 126 ms 3944 KB Output is correct
19 Correct 115 ms 4096 KB Output is correct
20 Correct 107 ms 3580 KB Output is correct
21 Correct 127 ms 4036 KB Output is correct
22 Correct 111 ms 3940 KB Output is correct
23 Correct 125 ms 4088 KB Output is correct
24 Correct 95 ms 3648 KB Output is correct
25 Correct 123 ms 4208 KB Output is correct
26 Correct 144 ms 3952 KB Output is correct
27 Correct 121 ms 4184 KB Output is correct
28 Correct 121 ms 4152 KB Output is correct
29 Execution timed out 4078 ms 189692 KB Time limit exceeded
30 Halted 0 ms 0 KB -