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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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int s, v;
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cin >> s >> v;
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int t_walk = ceil(1.0 * s / v) + 10;//注意上取整
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int from_zero = 60 * (24 + 8) - t_walk;
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int hh = from_zero / 60 % 24;
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int mm = from_zero % 60;
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printf("%02d:%02d", hh, mm);
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return 0;
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} |
