题目描述
#include <cstdio> using namespace std; int main(){ double x,y; scanf("%lf %lf",&x,&y); if (x >= -1 and x <=1 and y>= -1 and y <= 1) { printf("Yes"); } else { printf("No"); } return 0; }
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原文:https://www.cnblogs.com/yangzhicheng-blog/p/10350928.html