oj.uz

Submission #593296

# Submission time Handle Problem Language Result Execution time Memory
593296 2022-07-10T19:42:32 Z Summers Star triangles (IZhO11_triangle) C++14
100 / 100
 113 ms 14148 KB 
#include<bits/stdc++.h>
#include<unordered_map>
#define endl '\n'
using namespace std;
long long a[1000000], b[1000000];
unordered_map<long long,long long>mp,mp2;
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    long long i,j,k,br=0,n;

    cin>>n;

    for(i=0;i<n;i++)
    {
        cin>>a[i]>>b[i];

        mp[a[i]]++;
        mp2[b[i]]++;
    }
    for(i=0;i<n;i++)
    {
        br+=(mp[a[i]]-1)*(mp2[b[i]]-1);
    }

    cout<<br<<endl;

}

Compilation message

triangle.cpp: In function 'int main()':
triangle.cpp:13:17: warning: unused variable 'j' [-Wunused-variable]
   13 |     long long i,j,k,br=0,n;
      |                 ^
triangle.cpp:13:19: warning: unused variable 'k' [-Wunused-variable]
   13 |     long long i,j,k,br=0,n;
      |                   ^

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 5 ms 980 KB Output is correct
13 Correct 4 ms 992 KB Output is correct
14 Correct 5 ms 1364 KB Output is correct
15 Correct 37 ms 6644 KB Output is correct
16 Correct 40 ms 6920 KB Output is correct
17 Correct 38 ms 6660 KB Output is correct
18 Correct 37 ms 6660 KB Output is correct
19 Correct 100 ms 13344 KB Output is correct
20 Correct 67 ms 10408 KB Output is correct
21 Correct 103 ms 14080 KB Output is correct
22 Correct 113 ms 14148 KB Output is correct