Cod sursa(job #131090)

Utilizator c_sebiSebastian Crisan c_sebi Data 3 februarie 2008 10:48:34
Problema Dreptunghiuri Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.9 kb
#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;
}