oj.uz

Submission #715081

# Submission time Handle Problem Language Result Execution time Memory
715081 2023-03-25T22:11:18 Z TheConverseEngineer Planine (COCI21_planine) C++17
0 / 110
 6 ms 468 KB 
#include <bits/stdc++.h>
using namespace std;

#define FOR(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define sqr(x) ((ll)(x))*(x)
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

vector<pii> p;
vector<pair<double, double>> intervals;
int N, H;

int main() {
	cin >> N >> H; p.resize(N); FOR(i, 0, N) cin >> p[i].first >> p[i].second;

	intervals.resize((N-3)/2);
 	for (int i = 2; i < N-1; i += 2) {
		intervals[(i/2)-1] = {p[i].first + ((double)(H-p[i].second)*(p[i-1].first-p[i].first))/(p[i-1].second-p[i].second), p[i].first + ((double)(H-p[i].second)*(p[i+1].first-p[i].first))/(p[i+1].second-p[i].second)};
	}
	sort(all(intervals));
	double furthest = -299999999ll; int f = 0;
	FOR(i, 0, (N-3)/2) {
		if (intervals[i].first > furthest) {
			f++;
			furthest = intervals[i].second;
		}
	}
	cout << f;
}

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 468 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 304 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 468 KB Output isn't correct
2 Halted 0 ms 0 KB -