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Submission #654648

# Submission time Handle Problem Language Result Execution time Memory
654648 2022-11-01T05:11:26 Z horiseun Lightning Rod (NOI18_lightningrod) C++11
100 / 100
 1725 ms 175444 KB 
#include <iostream>
#include <stack>
#include <tuple>
#include <algorithm>
using namespace std;

#define f first
#define s second

int n, x, y, cx, cy;
stack<pair<int, int>> s;

int main() {

    ios_base::sync_with_stdio(false);
    cin.tie(0);

    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> x >> y;
        bool inc = true;
        while (s.size()) {
            tie(cx, cy) = s.top();
            if (x - cx <= cy - y) {
                inc = false;
                break;
            }
            if (x - cx <= y - cy) s.pop();
            else break;
        }
        if (inc) s.push({x, y});
    }

    cout << s.size() << "\n";


}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1432 ms 166808 KB Output is correct
2 Correct 1435 ms 165396 KB Output is correct
3 Correct 1377 ms 159204 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 324 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 316 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 324 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 324 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 324 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 39 ms 3880 KB Output is correct
15 Correct 41 ms 3632 KB Output is correct
16 Correct 35 ms 3708 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1414 ms 121104 KB Output is correct
2 Correct 1388 ms 120568 KB Output is correct
3 Correct 1454 ms 117068 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1432 ms 166808 KB Output is correct
2 Correct 1435 ms 165396 KB Output is correct
3 Correct 1377 ms 159204 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 316 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 328 KB Output is correct
17 Correct 39 ms 3880 KB Output is correct
18 Correct 41 ms 3632 KB Output is correct
19 Correct 35 ms 3708 KB Output is correct
20 Correct 1414 ms 121104 KB Output is correct
21 Correct 1388 ms 120568 KB Output is correct
22 Correct 1454 ms 117068 KB Output is correct
23 Correct 1715 ms 175444 KB Output is correct
24 Correct 1725 ms 152276 KB Output is correct
25 Correct 1651 ms 132240 KB Output is correct