Cod sursa(job #2795274)

Utilizator mihnea134Ionescu Mihnea mihnea134 Data 6 noiembrie 2021 10:24:32
Problema Numarare triunghiuri Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.66 kb
#include <fstream>
#include <algorithm>
using namespace std;
ifstream cin("nrtri.in");
ofstream cout("nrtri.out");
int v[1000];
int main()
{
    int n,i=0,j=0,cnt=0;
    cin>>n;
    for(;i<n;i++)
        cin>>v[i];
    sort(v,v+n);
    for(i=0;i<n-2;i++)
    {
        for(j=i+1;j<n-1;j++)
        {
            if(i!=j&&i!=j+1)
            {
            if(v[i]+v[j]>=v[j+1])
        {
           int s=j,d=n,m;
        while (d-s>1)
        {
        m=(s+d)/2;
        if (v[i]+v[j]>=v[m])
            s=m;
        else
            d=m;
        }
        cnt+=s-j;
        }
            }
        }
    }
    cout<<cnt;
    return 0;
}