oj.uz

Submission #743258

# Submission time Handle Problem Language Result Execution time Memory
743258 2023-05-17T09:16:43 Z vjudge1 Lightning Rod (NOI18_lightningrod) C++17
40 / 100
 2000 ms 262144 KB 
#include <bits/stdc++.h>
using namespace std;
vector<pair<int, int>> v;

bool sorted(const pair<int, int> &a, const pair<int, int> &b)
{
    if (a.second == b.second)
        return a.first > b.first;
    return a.second > b.second;
}

bool check(int x1, int x2, int y1, int y2)
{
    return abs(x1 - x2) <= y1 - y2;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    unordered_map<int, int> ma;
    int n, a, b;
    cin >> n;
    for (int i = 1; i <= n; ++i)
    {
        cin >> a >> b;
        v.push_back({a, b});
        ma[i - 1] = -1;
    }
    long long sum = n;
    sort(v.begin(), v.end(), sorted);
    for (int i = 0; i < v.size(); ++i)
    {
        for (int j = 0; j < v.size(); ++j)
        {
            if (ma[j] == -1 && i != j && check(v[i].first, v[j].first, v[i].second, v[j].second))
            {
                sum--;
                ma[j] = i;
            }
        }
    }
    cout << sum;
}

Compilation message

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:33:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for (int i = 0; i < v.size(); ++i)
      |                     ~~^~~~~~~~~~
lightningrod.cpp:35:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for (int j = 0; j < v.size(); ++j)
      |                         ~~^~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Runtime error 1538 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 1 ms 212 KB Output is correct
2 Correct 1 ms 320 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 316 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 320 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 316 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 312 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 320 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 316 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 312 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 21 ms 324 KB Output is correct
12 Correct 32 ms 340 KB Output is correct
13 Correct 32 ms 432 KB Output is correct

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 320 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 316 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 312 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 21 ms 324 KB Output is correct
12 Correct 32 ms 340 KB Output is correct
13 Correct 32 ms 432 KB Output is correct
14 Execution timed out 2037 ms 14652 KB Time limit exceeded
15 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1498 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 1538 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -