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Submission #537487

# Submission time Handle Problem Language Result Execution time Memory
537487 2022-03-15T07:15:01 Z joelau Planine (COCI21_planine) C++14
20 / 110
 230 ms 24692 KB 
#include <bits/stdc++.h>
using namespace std;

int N,H;
pair<int,int> A[1000005];
vector< pair<long double,long double> > lst;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    cin >> N >> H;
    for (int i = 0; i < N; ++i) cin >> A[i].first >> A[i].second;
    for (int i = 2; i < N-1; i += 2) {
        long double x1 = A[i].first - (long double) (A[i].first - A[i-1].first) / (A[i-1].second - A[i].second) * (H - A[i].second);
        long double x2 = A[i].first + (long double) (A[i+1].first - A[i].first) / (A[i+1].second - A[i].second) * (H - A[i].second);
        lst.emplace_back(x2,x1);
    }
    sort(lst.begin(),lst.end());
    int ans = 0;
    long double n = -1e18;
    for (auto x: lst) if (n < x.second) ans++, n = x.first;
    cout << ans;

    return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 724 KB Output is correct
2 Correct 3 ms 724 KB Output is correct
3 Correct 6 ms 724 KB Output is correct
4 Correct 20 ms 3196 KB Output is correct
5 Correct 21 ms 3280 KB Output is correct
6 Correct 21 ms 3248 KB Output is correct
7 Correct 183 ms 24652 KB Output is correct
8 Correct 230 ms 24692 KB Output is correct
9 Correct 213 ms 24668 KB Output is correct

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 724 KB Output is correct
2 Correct 3 ms 724 KB Output is correct
3 Correct 6 ms 724 KB Output is correct
4 Correct 20 ms 3196 KB Output is correct
5 Correct 21 ms 3280 KB Output is correct
6 Correct 21 ms 3248 KB Output is correct
7 Correct 183 ms 24652 KB Output is correct
8 Correct 230 ms 24692 KB Output is correct
9 Correct 213 ms 24668 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Incorrect 1 ms 340 KB Output isn't correct
12 Halted 0 ms 0 KB -