zju1105

#include <iostream>#include <cmath>using namespace std;double CalDistance();void Init();struct Coordinate{double startx, starty, endx, endy;};Coordinate coordinate[110];int x, y, len = 0;int main(){double Dis = 0.0, time = 0.0;int spend;while (cin >> x >> y){Init();Dis = CalDistance();time = Dis * 60 * 2.0 / 20000.0;spend = floor(time + 0.5);//time += Dis / 50000.0;cout << spend / 60 << ":" << spend % 60<< endl;time = 0.0;}return 0;}void Init(){while (cin >> coordinate[len].startx >> coordinate[len].starty >> coordinate[len].endx >> coordinate[len].endy)++len;return;}double CalDistance(){double distance = 0.0;for (int i = 0; i < len; ++i){distance += sqrt((coordinate[i].endx - coordinate[i].startx) * (coordinate[i].endx - coordinate[i].startx) + (coordinate[i].endy - coordinate[i].starty) * (coordinate[i].endy - coordinate[i].starty));}return distance;}