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OI-codes/Luogu/P5735/P5735.cpp

12 lines
369 B
C++

// R38740507
#include <bits/stdc++.h>
using namespace std;
int main() {
double x1, y1, x2, y2, x3, y3;
scanf("%lf%lf%lf%lf%lf%lf", &x1, &y1, &x2, &y2, &x3, &y3), printf("%.2lf\n", sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)) + sqrt((x2 - x3) * (x2 - x3) + (y2 - y3) * (y2 - y3)) + sqrt((x1 - x3) * (x1 - x3) + (y1 - y3) * (y1 - y3)));
return 0;
}