23 lines
385 B
C++
23 lines
385 B
C++
#include<iostream>
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#include<math.h>
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using namespace std;
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int main() {
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double k;
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double current = 0.000000;
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cin >> k;
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int count = 1;
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while (true) {
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current = current + 2.000000 * pow(0.98, count - 1);
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if (current >= k) {
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cout << count << endl;
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break;
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}
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count++;
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}
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return 0;
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}
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