Functions

#include <bits/stdc++.h>

using namespace std;

double distance(int xa, int ya, int xb, int yb) {
    return sqrt((xa - xb) * (xa - xb) + (ya - yb) * (ya - yb));
}

double getPerimeter(int xa, int ya, int xb, int yb, int xc, int yc) {
    return distance(xa, ya, xb, yb) + distance(xa, ya, xc, yc) + distance(xb, yb, xc, yc);
}

int main() {
    int xa, ya, xb, yb, xc, yc;
    cin >> xa >> ya >> xb >> yb >> xc >> yc;
    cout << getPerimeter(xa, ya, xb, yc, xc, yc) << endl;
    int xp, yp, xq, yq, xr, yr;
    cin >> xp >> yp >> xq >> yq >> xr >> yr;
    cout << getPerimeter(xp, yp, xq, yq, xr, yr)
    return 0;
}