40 lines
630 B
C++
40 lines
630 B
C++
#include <iostream>
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#include <string>
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#include <vector>
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typedef long long ll;
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void GrayCode(ll n) {
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if (n <= 0) {
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return;
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}
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std::vector<std::string> code;
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code.push_back("0");
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code.push_back("1");
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ll i, j;
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for (i = 2; i < (1 << n); i = i << 1) {
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for (j = i - 1; j >= 0; j--) {
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code.push_back(code[j]);
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}
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for (j = 0; j < i; j++) {
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code[j] = "0" + code[j];
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}
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for (j = i; j < 2 * i; j++) {
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code[j] = "1" + code[j];
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}
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}
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for (i = 0; i < code.size(); i++)
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std::cout << code[i] << std::endl;
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}
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int main() {
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ll n;
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std::cin >> n;
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GrayCode(n);
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return 0;
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}
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