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Submission #515940

# Submission time Handle Problem Language Result Execution time Memory
515940 2022-01-20T07:23:21 Z Joo Lightning Rod (NOI18_lightningrod) C++17
100 / 100
 1851 ms 192504 KB 
#include <bits/stdc++.h>
using namespace std;



int main(void){
    ios_base::sync_with_stdio(0); cin.tie(0);
    int n; cin >> n;
    stack<pair<int, int>> st;

    for(int i = 1; i <= n; i++){
        int x, y; cin >> x >> y;
        while(!st.empty() and x-st.top().first <= y-st.top().second) st.pop();
        if(st.empty() or (x-st.top().first > y-st.top().second and x-st.top().first > st.top().second-y)) st.push({x, y});
    }

    cout << st.size();

    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1375 ms 192504 KB Output is correct
2 Correct 1410 ms 191888 KB Output is correct
3 Correct 1369 ms 186692 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 304 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 304 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 312 KB Output is correct
10 Correct 0 ms 204 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 304 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 312 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 352 KB Output is correct
13 Correct 1 ms 324 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 304 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 312 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 352 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 36 ms 3864 KB Output is correct
15 Correct 39 ms 3660 KB Output is correct
16 Correct 34 ms 3636 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1372 ms 147620 KB Output is correct
2 Correct 1368 ms 147508 KB Output is correct
3 Correct 1382 ms 143944 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1375 ms 192504 KB Output is correct
2 Correct 1410 ms 191888 KB Output is correct
3 Correct 1369 ms 186692 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 304 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 312 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 352 KB Output is correct
16 Correct 1 ms 324 KB Output is correct
17 Correct 36 ms 3864 KB Output is correct
18 Correct 39 ms 3660 KB Output is correct
19 Correct 34 ms 3636 KB Output is correct
20 Correct 1372 ms 147620 KB Output is correct
21 Correct 1368 ms 147508 KB Output is correct
22 Correct 1382 ms 143944 KB Output is correct
23 Correct 1849 ms 175672 KB Output is correct
24 Correct 1851 ms 156960 KB Output is correct
25 Correct 1758 ms 140096 KB Output is correct