'a2' was not declared in this scope
 tu+=(b-a2)/2;

-_- ,想知道AC了没，编译错误: /code/judger/test/1752673861272969216/main11.cpp: In function 'int main()':
/code/judger/test/1752673861272969216/main11.cpp:6:8: error: 'a2' was not declared in this scope
 tu+=(b-

#include <bits/stdc++.h>
using namespace std;
int main(){
	int ji=0,tu=0,a,b;
	cin>>a>>b;
	tu+=(b-a*2)/2;
	ji+=a-tu;
	if(ji<0||tu<0){
		cout<<"No";
		return 0;
	}
	if(ji*2+tu*4==b ){
		cout<<"Yes";
	}
	else{
		cout<<"No";
	}
	return 0;
}


鸡兔同笼2

嗨嗨嗨

#include <bits/stdc++.h>
using namespace std;
int main(){
int ji=0,tu=0,a,b;
cin>>a>>b;
tu+=(b-a2)/2;
ji+=a-tu;
if(ji<0|

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