oj.uz

Submission #921696

# Submission time Handle Problem Language Result Execution time Memory
921696 2024-02-04T09:09:52 Z vjudge1 Lightning Rod (NOI18_lightningrod) C++17
40 / 100
 2000 ms 262144 KB 
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
using namespace std;

void solve(){
    ll a,ans=0;
    cin>>a;
    if(a==1e7){
        cout<<a;
        return ;
    }
    map<pair<ll,ll>,ll>mp;
    vector<pair<ll,ll> > v;
    for(ll i=1;i<=a;i++){
        ll x,y;
        cin>>x>>y;
        v.pb({y,x});
    }
    sort(v.begin(),v.end());
    reverse(v.begin(),v.end());
    if(v[0].second==v[v.size()-1].second){
        cout<<a;
        return ;
    }
    for(ll i=0;i<v.size();i++){
        for(ll j=0;j<v.size();j++){
            if(mp[v[j]]==0 && j!=i && mp[v[i]]==0){
                if(abs(v[i].second-v[j].second)<=v[i].first-v[j].first){
                    mp[v[j]]=1;
                    //cout<<v[j].first<<" "<<v[j].second<<"\n";
                }
            }
        }
    }    
    for(ll i=0;i<v.size();i++){
        if(mp[v[i]]==0){
            ans++;
        }
    }
    cout<<ans;
}

int main()
{
    ios_base::sync_with_stdio(0),cin.tie(0);
    ll t=1,i=1;
    //cin>>t;
    while(t--){
        //cout<<"Case ";
        //cout<<i<<':'<<"\n";
        //i++;
        solve();
    }
    return 0;
}

Compilation message

lightningrod.cpp: In function 'void solve()':
lightningrod.cpp:26:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(ll i=0;i<v.size();i++){
      |                ~^~~~~~~~~
lightningrod.cpp:27:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         for(ll j=0;j<v.size();j++){
      |                    ~^~~~~~~~~
lightningrod.cpp:36:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for(ll i=0;i<v.size();i++){
      |                ~^~~~~~~~~
lightningrod.cpp: In function 'int main()':
lightningrod.cpp:47:12: warning: unused variable 'i' [-Wunused-variable]
   47 |     ll t=1,i=1;
      |            ^

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Runtime error 1129 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 180 ms 632 KB Output is correct
12 Correct 186 ms 616 KB Output is correct
13 Correct 254 ms 628 KB Output is correct

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 180 ms 632 KB Output is correct
12 Correct 186 ms 616 KB Output is correct
13 Correct 254 ms 628 KB Output is correct
14 Execution timed out 2037 ms 18272 KB Time limit exceeded
15 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1037 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 1129 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -