Submission #87012

#TimeUsernameProblemLanguageResultExecution timeMemory
87012Aydarov03Star triangles (IZhO11_triangle)C++14
0 / 100
2 ms484 KiB
#include <bits/stdc++.h> #define fr first #define sc second using namespace std; map<int , int> x , y; 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); x[a]++; y[b]++; xy.push_back( {a , b} ); } for(int i = 0; i < xy.size(); i++) { if( y.count( xy[i].second ) ) ans += min( x[ xy[i].first ] - 1 , y[ xy[i].second ] - 1 ); } cout << ans; }

Compilation message (stderr)

triangle.cpp:15:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
triangle.cpp: In function 'int main()':
triangle.cpp:31:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < xy.size(); i++)
                    ~~^~~~~~~~~~~
triangle.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d" , &a , &b);
         ~~~~~^~~~~~~~~~~~~~~~~~
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