oj.uz

Submission #87013

# Submission time Handle Problem Language Result Execution time Memory
87013 2018-11-29T07:52:12 Z Aydarov03 Star triangles (IZhO11_triangle) C++14
100 / 100
 1053 ms 25096 KB 
#include <bits/stdc++.h>
#define fr first
#define sc second
using namespace std;

map<int , int> x , y;
map <pair<int,int> , bool> used;


vector < pair<int,int> > xy;






main()
{
    int n , ans = 0;
    cin >> n;

    for(int i = 1; i <= n; i++)
    {
        int a , b;
        scanf("%d%d" , &a , &b);


        if( used.count( { a,b } )  )continue;
        x[a]++;
        y[b]++;
        xy.push_back( {a , b} );
        used[ {a,b} ] = 1;
    }



    for(int i = 0; i < xy.size(); i++)
    {
        if( y.count( xy[i].second ) )
        ans +=  (x[ xy[i].first ]-1) *  (y[  xy[i].second ] - 1) ;
    }


    cout << ans;

}

Compilation message

triangle.cpp:17:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
triangle.cpp: In function 'int main()':
triangle.cpp:37:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < xy.size(); i++)
                    ~~^~~~~~~~~~~
triangle.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d" , &a , &b);
         ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 448 KB Output is correct
4 Correct 2 ms 448 KB Output is correct
5 Correct 2 ms 628 KB Output is correct
6 Correct 2 ms 640 KB Output is correct
7 Correct 2 ms 640 KB Output is correct
8 Correct 2 ms 700 KB Output is correct
9 Correct 2 ms 700 KB Output is correct
10 Correct 3 ms 700 KB Output is correct
11 Correct 3 ms 700 KB Output is correct
12 Correct 16 ms 1800 KB Output is correct
13 Correct 14 ms 1820 KB Output is correct
14 Correct 21 ms 2076 KB Output is correct
15 Correct 285 ms 10656 KB Output is correct
16 Correct 332 ms 11276 KB Output is correct
17 Correct 305 ms 11276 KB Output is correct
18 Correct 276 ms 11276 KB Output is correct
19 Correct 926 ms 24388 KB Output is correct
20 Correct 695 ms 24388 KB Output is correct
21 Correct 995 ms 24956 KB Output is correct
22 Correct 1053 ms 25096 KB Output is correct