Cod sursa(job #983310)
Utilizator | Stefan Popa stefanzzz | Data | 11 august 2013 15:10:26 |
---|---|---|---|
Problema | Inundatii | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.54 kb |
#include <fstream>
#define MAXN 50005
using namespace std;
ifstream f("inundatii.in");
ofstream g("inundatii.out");
int n,x,y,z;
long long S;
int main()
{
int i;
f>>n;
if(n==1){
g<<"0\n";
return 0;}
for(i=1;i<=n/2;i++){
f>>x>>y>>z;
S+=x+y+z;}
f>>x>>y>>z;
if(n%2==0)
S-=(x+y+z);
for(i=n/2+2;i<=n;i++){
f>>x>>y>>z;
S-=(x+y+z);}
S+=3*n/2*(n/2+1);
if(n%2==0)
S-=3;
g<<S<<'\n';
f.close();
g.close();
return 0;
}