oj.uz

Submission #707572

# Submission time Handle Problem Language Result Execution time Memory
707572 2023-03-09T10:59:36 Z Trisanu_Das Osumnjičeni (COCI21_osumnjiceni) C++17
0 / 110
 194 ms 19756 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
 
const int mxN=2e5;
int n, q, l[mxN], r[mxN], anc[mxN][18];
 
int main() {
	cin >> n;
	for (int i=0; i<n; ++i) cin >> l[i] >> r[i];
	set<array<int, 2>> s;
	for (int i=n-1, j=n-1; ~i; --i) {
		while(true) {
			if (s.empty()||r[i]<(*s.begin())[0]||l[i]>(*s.rbegin())[1]) {
				s.insert({l[i], r[i]});
				break;
			}
			auto it=s.lower_bound({l[i], -1});
			if ((it==s.end()||r[i]<(*it)[0])&&(it==s.begin()||(*prev(it))[1]<l[i])) {
				s.insert({l[i], r[i]});
				break;
			}
			s.erase({l[j], r[j]});
			--j;
		}
		anc[i][0]=j+1;
	}
	for (int j=1; j<18; ++j) for (int i=0; i<n; ++i) anc[i][j]=anc[i][j-1]==n?n:anc[anc[i][j-1]][j-1];
	cin >> q;
	while(q--) {
		int a, b;
		cin >> a >> b, --a, --b;
		int ans = 1;
		for (int i = 17; i > 0; --i)
			if (anc[a][i] <= b) {
				ans += 1 << i;
				a = anc[a][i];
			}
		cout << ans << "\n";
	}
	return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 180 ms 18892 KB Output is correct
2 Correct 186 ms 18676 KB Output is correct
3 Correct 191 ms 18724 KB Output is correct
4 Correct 180 ms 18896 KB Output is correct
5 Incorrect 194 ms 19756 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 16 ms 852 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 16 ms 852 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 192 ms 19708 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 180 ms 18892 KB Output is correct
2 Correct 186 ms 18676 KB Output is correct
3 Correct 191 ms 18724 KB Output is correct
4 Correct 180 ms 18896 KB Output is correct
5 Incorrect 194 ms 19756 KB Output isn't correct
6 Halted 0 ms 0 KB -