Submission #593297

#	Time	Username	Problem	Language	Result	Execution time	Memory
593297		daisy2	Star triangles (IZhO11_triangle)	C++14	100 / 100	352 ms	5304 KiB

triangle

#include<iostream>
#include<algorithm>
#include<unordered_map>
using namespace std;
int n,x[300005],y[300005];
unordered_map <long long,long long> row,col;
int main()
{
   cin>>n;

   for(int i=0;i<n;i++)
   {
       cin>>x[i]>>y[i];
       if(!col.count(x[i]))
        col[x[i]]=0;

        if(!row.count(y[i]))
        row[y[i]]=0;

        col[x[i]]++;
        row[y[i]]++;
   }
   long long br=0;
   for(int i=0;i<n;i++)
   {
       br+=(row[y[i]]-1)*(col[x[i]]-1);
   }
   cout<<br<<endl;
}

Compilation message (stderr)

triangle.cpp: In function 'int main()':
triangle.cpp:14:8: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   14 |        if(!col.count(x[i]))
      |        ^~
triangle.cpp:17:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   17 |         if(!row.count(y[i]))
      |         ^~

• Subtask 1: 100 / 100