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13 lines
209 B
13 lines
209 B
2 years ago
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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 n;
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cin >> n;
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if (n <= 20) printf("%d", n * 10);
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else
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printf("%d", 20 * 10 + (n - 20) * 15);
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return 0;
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}
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