Cod sursa(job #1927540)
Utilizator | Data | 15 martie 2017 10:51:07 | |
---|---|---|---|
Problema | Numarare triunghiuri | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.46 kb |
#include <fstream>
using namespace std;
ifstream f("nrtri.in");
ofstream g("nrtri.out");
int i,j,n,st,dr,mi,v[801],nr;
int main()
{
f>>n;
for(i=1;i<=n;i++)
f>>v[i];
st=1;dr=n;mi=(st+dr)/2;
while(st<dr&&mi!=st&&mi!=dr)
{
if(v[st]+v[mi]>v[dr])
{
nr++;
st++;
mi++;
}
else dr--;
mi=(st+dr)/2;
}
g<<nr;
return 0;
}