Algorithm
Problem Name: beecrowd | 1154
Problem Link: https://www.beecrowd.com.br/judge/en/problems/view/1154
Adapted by Neilor Tonin, URI 
Brazil
Timelimit: 1
Write an algorithm to read an undeterminated number of data, each containing an individual's age. The final data, which will not enter in the calculations, contains the value of a negative age. Calculate and print the average age of this group of individuals.
Input
The input contains an undetermined number of integers. The input will be stop when a negative value is read.
Output
The output contains a value corresponding to the average age of individuals.
The average should be printed with two digits after the decimal point.
| Input Sample | Output Sample |
|
34 |
39.25 |
Code Examples
#1 Code Example with C++ Programming
Code -
C++ Programming
#include<bits/stdc++.h>
#define FIXED_FLOAT(x) std::fixed << std::setprecision(2) << (x)
using namespace std;
int main(){
int sum = 0;
int cnt = 0;
while(1){
int n;
cin >> n;
if (n < 0){
break;
}
sum += n;
cnt += 1;
}
cout << FIXED_FLOAT(((1.0) * sum) / cnt) << endl;
return 0;
}
Input
Output
#2 Code Example with Java Programming
Code -
Java Programming
import java.io.IOException;
import java.util.Scanner;
public class Main{
public static void main(String[] args) throws IOException{
Scanner input = new Scanner(System.in);
int sum = 0;
int cnt = 0;
while(true){
int n = input.nextInt();
if (n < 0){
break;
}
sum += n;
cnt += 1;
}
System.out.printf("%.2f\n", (((1.0) *sum) / cnt));
}
}
Input
Output
#3 Code Example with Javascript Programming
Code -
Javascript Programming
var input = require('fs').readFileSync('/dev/stdin', 'utf8');
var lines = input.split('\n');
var sum = 0;
var cnt = 0;
while(true){
var n = parseInt(lines.shift());
if (n < 0){
break;
}
sum += n;
cnt += 1;
}
console.log((sum / cnt).toFixed(2));
Input
Output
#4 Code Example with Python Programming
Code -
Python Programming
sum = 0
cnt = 0
while(True):
n = int(input())
if (n < 0):
break
sum += n
cnt += 1
print("{:.2f}".format(sum / cnt))
Input
Output