20 lines
331 B
C++
20 lines
331 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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float x;
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cin >> x;
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float pre = 2;
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float sum = 2;
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for (int i = 2;; i++) {
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sum += pre * 0.98;
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pre = pre * 0.98;
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if (sum > x) {
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cout << i << endl;
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break;
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}
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}
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return 0;
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}
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