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#include <iostream>
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using namespace std;
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/*
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1折 ---- 3段绳子
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2折 ---- 5段绳子
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3折 ---- 9段绳子
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4折 ---- 17段绳子
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n折
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*/
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int main() {
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int n;
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cin >> n;
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int s = 1;
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for (int i = 1; i <= n; i++) s *= 2;
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printf("%d", s + 1);
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return 0;
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} |
