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Submission #416258

# Submission time Handle Problem Language Result Execution time Memory
416258 2021-06-02T08:54:37 Z strawberry2005 Lightning Rod (NOI18_lightningrod) C++17
11 / 100
 2000 ms 79692 KB 
#include<bits/stdc++.h>
using namespace std;

//#define int long long
#define pb push_back
#define F first
#define S second
#define mp make_pair
#define nl '\n'
const int mod = 1e9+7;
#define deb(x) cout<<#x<<": "<<x<<endl

int iceil(int a, int b) {
  return (a + b - 1) / b;
}
int mod_fun(int a, int mod){
  while(a < 0) a += mod;
  return a % mod;
}

signed main(){

    #ifdef strawberryshaker2005
        freopen("input.txt", "r", stdin);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    //cout.tie(NULL);

    int n;
    cin>>n;
    stack<pair<int,int>> s;
    for(int i=0;i<n;i++){
        int x,y,add=0;
        cin>>x>>y;
        while(!s.empty()&&abs(x-s.top().F)<=abs(y-s.top().S)){
            s.pop();
        }
        if(!s.empty()&&abs(x-s.top().F)<=abs(y-s.top().S)) continue;
        s.push({x,y});
    }
    cout<<s.size();


    return(0);
    
}

Compilation message

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:35:17: warning: unused variable 'add' [-Wunused-variable]
   35 |         int x,y,add=0;
      |                 ^~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1922 ms 79692 KB Output is correct
2 Correct 1926 ms 79492 KB Output is correct
3 Correct 1880 ms 77348 KB Output is correct

Subtask #2
7.0 / 7.0

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

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 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 1 ms 204 KB Output is correct
8 Incorrect 0 ms 204 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 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 1 ms 204 KB Output is correct
8 Incorrect 0 ms 204 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 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 1 ms 204 KB Output is correct
8 Incorrect 0 ms 204 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2088 ms 38660 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1922 ms 79692 KB Output is correct
2 Correct 1926 ms 79492 KB Output is correct
3 Correct 1880 ms 77348 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Incorrect 0 ms 204 KB Output isn't correct
12 Halted 0 ms 0 KB -