C :

#include<stdio.h>

int main(){
	int i,j;
	for(i = 1;i < 50;i++){	  //i是鸡的数量	 
		if(i * 2 + (50 - i) * 4 == 160){
			printf("%d %d",i,50-i); 
		}   
    } 
    return 0;
}

C++ :

#include <iostream>

using namespace std;

int main(){
	
	cout<<"20 30"<<endl;
}

Pascal :

var
  j,t,a,b,n,i:longint;
begin
  for j:=1 to 50 do
  for t:=1 to 50 do
  begin
  if (j*2+t*4=160) and (j+t=50) then write(j,' ',t);
  end;
end.

Java :

public class Main{
	public static void main(String[] args) {
		for(int i=0;i<50;i++){
			for(int j=0;j<50;j++){
				if(i+j==50){
					if(2*i+4*j==160){
						System.out.println(i+" "+j);
					}
				}
			}
		}
	}
}

Python :

for r in range(0, 50):
    c = 50 - r
    cl = 2 * c
    rl = 4 * r
    if cl + rl == 160:
     print(c, r)