Cod sursa(job #2757749)
Utilizator | Mihai Ariton Mihai_Ariton | Data | 6 iunie 2021 12:37:57 |
---|---|---|---|
Problema | Numarare triunghiuri | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.99 kb |
#include <iostream>
#include <algorithm>
#include <fstream>
using namespace std;
int v[1000];
int main()
{
ifstream cin ("nrtri.in");
ofstream cout("nrtri.out");
int n, cnt=0, st, dr, ok=0, s=0;
cin>>n;
for(int i=1; i<=n; i++)
{
cin>>v[i];
}
sort(v+1, v+n+1);
/*for(int i=1; i<=n; i++)
{
cout<<v[i]<<" ";
}*/
for(int i=1; i<n; i++)
{
for(int j=i+1; j<n; j++)
{
s=v[i]+v[j];
/*while(dr-st>=1)
{
k=(dr+st)/2;
if(s>=v[k])
{
cnt++;
st=k;
}
else
{
dr=k;
}
}*/
for(int k=j+1; k<=n; k++)
{
if(s>=v[k])
cnt++;
else
break;
}
}
}
cout<<cnt;
return 0;
}