new file: P3375.cpp

P3375.cpp

@@ -0,0 +1,34 @@
+#include<bits/stdc++.h>
+using namespace std;
+char s1[1000006], s2[1000006];
+int n1, n2;
+int nxt[1000006];
+void gnext() {
+    for(int i = 2; i <= n2; ++i) {
+        int j = nxt[i - 1];
+        while(j > 0 && s2[j + 1] != s2[i]) j = nxt[j];
+        if(s2[j + 1] == s2[i]) j++;
+        nxt[i] = j;
+    }
+}
+void f() {
+    int j = 0;
+    for(int i = 1; i <= n1; ++i) {
+        while(j > 0 && s2[j + 1] != s1[i]) j = nxt[j];
+        if(s2[j + 1] == s1[i]) j++;
+        if(j == n2) {
+            printf("%d\n", i - n2 + 1);
+            j = nxt[j];
+        }
+    }
+}
+int main() {
+    scanf("%s%s", s1 + 1, s2 + 1);
+    n1 = strlen(s1 + 1), n2 = strlen(s2 + 1);
+    gnext();
+    f();
+    for(int i = 1; i <= n2; ++i) {
+        printf("%d ", nxt[i]);
+    }
+    return 0;
+}