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Cod sursa(job #131090)
#include <fstream.h>
using namespace std;
int nl, nc;
int sqr[160010];
void S(){
int i;
for(i=1; i<=400; i++)
sqr[i*i]=i;
}
int solve(int h, int w, int a){
int F=0;
int d;
double c1, c2;
if(w*w-4*a*(h-a)==0)
d=0;
else if(sqr[w*w-4*a*(h-a)])
d = sqr[w*w-4*a*(h-a)];
else d=-1;
if(d>=0) {
c1=(w+d)/2.;
c2=(w-d)/2.;
if(c1==c2)
if(w%2==0 && c1<w && c1>=0)
F=1;
else F=0;
else {
if((w+d)%2==0 && 0<=c1 && c1<w)
F++;
if((w-d)%2==0 && 0<=c2 && c2<w)
F++;
}
}
else F=0;
return F;
}
int main(){
int i, j, a, SOL=0, nr=0;
ifstream f("dreptunghiuri.in");
ofstream g("dreptunghiuri.out");
f>>nl>>nc;
S();
for(i=1; i<nl; i++) {
for(j=1; j<nc; j++){
for(nr=0, a=0; a<i; a++)
nr += solve(i, j, a);
nr *= (nl-i)*(nc-j);
SOL += nr;
}
}
g<<SOL<<endl;
f.close();
g.close();
return 0;
}