*
 * Complete the 'plusMinus' function below.
 *
 * The function accepts INTEGER_ARRAY arr as parameter.
 */

void plusMinus(vector<int> arr) {
int negCount{0},zeroCount{0},posCount{0};
 for (int number : arr ){
    number >0? posCount++:number<0?negCount++:zeroCount++;
 }
 double negRatio  = static_cast<double>(negCount)/arr.size();
 double posRatio  = static_cast<double>(posCount)/arr.size();
 double zeroRatio = static_cast<double>(zeroCount)/arr.size();
 cout<<std::fixed<<setprecision(6);
 cout << posRatio<<"\n"<<negRatio<<"\n"<<zeroRatio<<endl;

}