update ucpc2026

source/String/Duval.cpp

@@ -0,0 +1,12 @@
+// https://koosaga.com/301
+vi duval(vi &s){
+    int n=s.size(), i=0; vi v;
+    while(i<n) { int j=i+1, k=i;
+        while(j < n && s[k] <= s[j]){
+            if(s[k] == s[j]) j++, k++;
+            else if(s[k] < s[j]) j++, k = i;
+        }
+        while(i <= k) i += j - k, v.pb(i);
+    }
+    return v;
+}