oj.uz

Submission #899896

# Submission time Handle Problem Language Result Execution time Memory
899896 2024-01-07T09:00:07 Z TAhmed33 Fish 2 (JOI22_fish2) C++
0 / 100
 1 ms 6492 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int MAXN = 1e5 + 25;
pair <int, int> sparse[17][MAXN];
int a[MAXN], n;
int pref[MAXN];
pair <int, int> query (int l, int r) {
	int m = __lg(r - l + 1);
	auto x = max(sparse[m][l], sparse[m][r - (1 << m) + 1]);
	x.second *= -1;
	return x;
}
int get (int l, int r) {
	if (l > r) return 0;
	return pref[r] - pref[l - 1];
}
map <pair <int, int>, int> memo;
int ans (int l, int r) {
	if (l > r) return 0;
	if (l == r) return 1;
	if (memo.count({l, r})) return memo[{l, r}];
	auto u = query(l, r);
	int ret = 1;
	if (get(l, u.second - 1) >= a[u.second]) ret += ans(l, u.second - 1);
	if (get(u.second + 1, r) >= a[u.second]) ret += ans(u.second + 1, r);
	return memo[{l, r}] = ret; 
}
signed main () {
	ios::sync_with_stdio(0); cin.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
		sparse[0][i] = {a[i], -i};
		pref[i] = a[i] + pref[i - 1];
	}
	for (int i = 1; i < 17; i++) {
		for (int j = 1; j + (1 << i) - 1 <= n; j++) {
			sparse[i][j] = max(sparse[i - 1][j], sparse[i - 1][j + (1 << (i - 1))]);
		}
	}
	int q;
	cin >> q;
	while (q--) {
		int l, r;
		cin >> l >> r;
		cout << ans(l, r) << '\n';
	}
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 6492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 6488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 6492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 6488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 6488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 6492 KB Output isn't correct
2 Halted 0 ms 0 KB -