题解 | 绕距
绕距
https://www.nowcoder.com/practice/7a245fc6284f4139b4fb21de58e68483?tpId=383&tqId=292276&sourceUrl=%2Fexam%2Foj%3Fpage%3D1%26tab%3D%25E7%25AE%2597%25E6%25B3%2595%25E5%25AD%25A6%25E4%25B9%25A0%25E7%25AF%2587%26topicId%3D383
#include <bits/stdc++.h>
using namespace std;
int main(){
int xx1,yy1,xx2,yy2;
cin>>xx1>>yy1>>xx2>>yy2;
double E=sqrt((xx1-xx2)*(xx1-xx2)+(yy1-yy2)*(yy1-yy2));
double M=fabs(xx1-xx2)+fabs(yy1-yy2);
double distance=fabs(M-E);
cout<<fixed<<setprecision(18)<<distance;
return 0;
}
