#include <iostream>
#include <stdio.h>
using namespace std;
double findAverage(int categories, double weights[], double scores[])
{
 double average = 0;
 
 for(int i = 0; i <= categories - 1; i++)
 {
  average += (weights[i] * scores[i]);
  printf( "%lf ", average);
 }
 
 return average;
}
double w[3]={0.3,0.3,0.4};
double s[3]={0.4,0.4,0.4};
 
int main() {
	// your code goes here
	double av=findAverage(3,w,s);
	printf("cu=%lf\n",av/(w[0]+w[1]+w[2]));
	return 0;
}

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