updated tcr

1 files changed, 11 insertions, 0 deletions

diff --git a/string/lyndon.cpp b/string/lyndon.cpp
new file mode 100644
index 0000000..6a131a5
--- /dev/null
+++ b/string/lyndon.cpp
@@ -0,0 +1,11 @@
+bool next(string& s, int n, char mi = '0', char ma = '1') {
+	for (ll i = sz(s), j = sz(s); i < n; i++)
+		s.push_back(s[i % j]);
+	while(!s.empty() && s.back() == ma) s.pop_back();
+	if (s.empty()) {
+		s = mi;
+		return false;
+	} else {
+		s.back()++;
+		return true;
+}}