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哈哈哈哈哈哈哈

Posted by KatrineYang at 2016-11-05 13:16:40 on Problem 2301
#include <stdio.h>
int main() {
	int n,a,b;
	scanf("%d",&n);
	while(n--){
		scanf("%d%d",&a,&b);
		if((a-b)%2||a<b)printf("impossible\n");
		else printf("%d %d\n",(a+b)/2,(a-b)/2);
	}
	return 0;
}

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