21 lines
504 B
C++
21 lines
504 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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int main() {
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double x1, y1, x2, y2;
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cin >> x1 >> y1;
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double sum = 0;
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while (cin >> x1 >> y1 >> x2 >> y2) {
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double dx = x1 - x2;
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double dy = y1 - y2;
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// 欧几里得距离
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sum += sqrt(dx * dx + dy * dy) * 2;
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}
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// 20千米/小时
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int minutes = round(sum / 1000 / 20 * 60);
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int hours = minutes / 60;
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minutes %= 60;
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printf("%d:%02d\n", hours, minutes);
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return 0;
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}
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