#include <stdio.h>
int fuga (int x,int y){
	int i,a;
	int sum=0;
	for(i=1;i<=y;i++){
		a=x*i;
		sum=+a;
	}
	return sum;
}
 
int main() {
	// your code goes here
 
	return 0;
}
 
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