oj.uz

Submission #1031906

# Submission time Handle Problem Language Result Execution time Memory
1031906 2024-07-23T08:37:09 Z Halym2007 Street Lamps (APIO19_street_lamps) C++17
0 / 100
 8 ms 2704 KB 
#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
#define sz size()
#define ll long long
#define pii pair <int, int> 
const int N = 1e5 + 5;

int l[N], r[N], n, m, jog, w[N];
bool vis[N];
vector <pii> v[N];

int st[3 * N];

void update (int idx, int x, int y, int val) {
	if (x == y) {
		st[idx] = w[x];
		return;
	}
	int mid = (x + y) / 2;
	if (val <= mid) update (idx * 2, x, mid, val);
	else update (idx * 2 + 1, mid + 1, y, val);
	st[idx] = min (st[idx * 2], st[idx * 2 + 1]);
}

int jogap (int idx, int x, int y, int l1, int r1) {
//	cout << "--> " << x << " " << y << " " << l1  << " " << r1 << " " << idx << " " << st[idx] << "\n";
	if (l1 <= x and y <= r1) return st[idx];
	if (l1 > y or x > r1) {
//		cout << "gaytdy\n";
		return 1e9;
	}
	int mid = (x + y) / 2;
	return min (jogap (idx * 2, x, mid, l1, r1), jogap (idx * 2 + 1, mid + 1, y, l1, r1));	
}

void dfs (int x, int y) {
	jog++;
	vis[x] = 1;
	for (pii i : v[x]) {
		if (vis[i.ff] or y > i.ss) continue;
		dfs (i.ff, y);
	}
}

int main () {
//	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//	freopen ("input.txt", "r", stdin);
	cin >> n >> m;
	for (int i = 1; i <= m; ++i) {
		cin >> l[i] >> r[i] >> w[i];
	}
	
	int q;
	cin >> q;
	for (int i = 1; i < n; ++i) {
		update (1, 1, n - 1, i);
	}
	while ( q-- ) {
		int typ, l1, r1;
		cin >> typ >> l1 >> r1;
		if (typ == 1) {
			w[l1] = r1;
			update (1, 1, n - 1, l1);
		}
		else {
			int x = 1, y = l1 - 1, jog1 = 0, jog2 = 0;
			while (x <= y) {
				int md = (x + y) / 2;
				int kk = jogap (1, 1, n - 1, l1 - md, l1 - 1);
				if (kk < r1) {
					y = md - 1;
				}
				else {
					jog1 = md;
					x = md + 1;
				}
			}
			x = 1, y = n - l1;
			
			while (x <= y) {
				int md = (x + y) / 2;
				if (jogap (1, 1, n - 1, l1, l1 + md - 1) < r1) {
					y = md - 1;
				}
				else {
					jog2 = md;
					x = md + 1;
				}
			}
			
			cout << jog1 + jog2 + 1 << "\n";
		}
	}
}

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2648 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 2652 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2704 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2648 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2648 KB Output isn't correct
2 Halted 0 ms 0 KB -