View Compilation Error

0_0_37698314_2822.cpp: In function 'int main()':
0_0_37698314_2822.cpp:28:13: error: redeclaration of 'int ans'
         int ans = lenp - nxt[lenp];
             ^
0_0_37698314_2822.cpp:24:13: note: 'int ans' previously declared here
         int ans = 0;
             ^