oj.uz

Submission #90340

# Submission time Handle Problem Language Result Execution time Memory
90340 2018-12-21T09:31:00 Z Bodo171 Star triangles (IZhO11_triangle) C++14
0 / 100
 2 ms 256 KB 
#include <iostream>
#include <map>
#include <algorithm>
#define x first
#define y second
using namespace std;
const int nmax=300005;
map<int,int> X,Y;
pair<int,int> v[nmax];
int n,i;
long long ans;
int main()
{
    cin>>n;
    for(i=1;i<=n;i++)
        cin>>v[i].x>>v[i].y;
    for(int cc=0;cc<4;cc++)
    {
        for(i=1;i<=n;i++)
        {
            if(cc>0)
            {
                    v[i].x*=-1;
            }
            else
            {
                if((cc&2)!=((cc-1)&2))
                    v[i].y*=-1;
            }
        }
        sort(v+1,v+n+1);
        for(i=n;i>=1;i--)
       {
        ans+=1LL*X[v[i].x]*Y[v[i].y];
        X[v[i].x]++,Y[v[i].y]++;
       }
     X.clear();Y.clear();
    }
    cout<<ans;
    return 0;
}

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -