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Submission #743941

# Submission time Handle Problem Language Result Execution time Memory
743941 2023-05-18T06:27:49 Z vjudge1 Lightning Rod (NOI18_lightningrod) C++17
100 / 100
 1927 ms 171544 KB 
#include<bits/stdc++.h>

using namespace std;

using ll = long long ;
using pii = pair<ll , ll> ;
using i3 = tuple<ll , ll , ll> ;

const int N = 2e5+5  ;
const int MOD = 1e9+7 ;

int n ;

map<pii , bool> vis ;

struct Points {
    int x , y ;
};

vector<Points> point ;

stack<Points> st ;

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

    cin >> n ;
    for(int i=0;i<n;i++){
        int x , y ; cin >> x >> y ;
        point.push_back({x , y}) ;
    }

    for(int i=0;i<n;i++){
        while(!st.empty() && point[i].y - st.top().y >= point[i].x - st.top().x){
            st.pop();
        }
        if(st.empty() || !(st.top().y - point[i].y >= point[i].x - st.top().x))
            st.push(point[i]);
    }
    cout << st.size() ;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1677 ms 171544 KB Output is correct
2 Correct 1613 ms 163156 KB Output is correct
3 Correct 1634 ms 158756 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 212 KB Output is correct
3 Correct 1 ms 212 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 212 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 212 KB Output is correct
3 Correct 1 ms 212 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 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 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 212 KB Output is correct
3 Correct 1 ms 212 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 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 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 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 212 KB Output is correct
3 Correct 1 ms 212 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 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 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 41 ms 5536 KB Output is correct
15 Correct 43 ms 5288 KB Output is correct
16 Correct 39 ms 5148 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1657 ms 142024 KB Output is correct
2 Correct 1601 ms 140532 KB Output is correct
3 Correct 1539 ms 136068 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1677 ms 171544 KB Output is correct
2 Correct 1613 ms 163156 KB Output is correct
3 Correct 1634 ms 158756 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 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 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 41 ms 5536 KB Output is correct
18 Correct 43 ms 5288 KB Output is correct
19 Correct 39 ms 5148 KB Output is correct
20 Correct 1657 ms 142024 KB Output is correct
21 Correct 1601 ms 140532 KB Output is correct
22 Correct 1539 ms 136068 KB Output is correct
23 Correct 1911 ms 137648 KB Output is correct
24 Correct 1927 ms 137612 KB Output is correct
25 Correct 1789 ms 143420 KB Output is correct