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-rw-r--r--introductory_problems/gray_code.cpp23
1 files changed, 23 insertions, 0 deletions
diff --git a/introductory_problems/gray_code.cpp b/introductory_problems/gray_code.cpp
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+++ b/introductory_problems/gray_code.cpp
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+// 2205. Gray Code
+#include <bits/stdc++.h>
+using namespace std;
+
+static int n;
+const int max_n = 16;
+static bool a[max_n + 1];
+
+void print(void) {
+ for (int i = n; i; i--)
+ printf("%d", a[i]);
+ printf("\n");
+}
+
+int main() {
+ scanf("%d", &n);
+ print();
+ for (int i = 1; i < 1 << n; i++) {
+ int lsb = __builtin_ffs(i);
+ a[lsb] ^= 1;
+ print();
+ }
+}