#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c=50,d=160;
	a=(d-2*c)/(4-2);
	b=c-a;
	cout<<"鸡的只数="<<a<<" "<<"兔的只数="<<b;
	
	
	
}
/**************************************************************
	Problem: 1015
	User: zhuangwenya
	Language: C++
	Result: Wrong Answer
****************************************************************/