infoarena informatica de performanta

int suma(int x){
	int s=0;
	while (x>0){s=s+x%10;
				x=x/10;
	}
	return s;
}
int main (){
	int i,iT,jT,iM,jM,n,j,poz;
	long s=0;
	short int x[40000];
	ifstream f("piata.in");
	ofstream g("piata.out");
	f>>n>>iT>>jT>>iM>>jM;
	for (i=1;i<=n;i++)
		x[i]=suma(i);
	for (i=iT;i<=iM;i++){
		for (j=jT;j<=jM;j++){
			if (j+1-i<1) poz=n-(i-j-1);
				else poz=j+1-i;
			s=s+x[poz];}
	}
		g<<s;
	g.close();
return 0;
}