View Compilation Error

0_0_29899281_29582.cpp: In function 'int main()':
0_0_29899281_29582.cpp:14:59: error: 'uesd' was not declared in this scope
         for(int i=0;i<26;i++) G[i].clear(),pre[l][i]=p[i]=uesd[i]=0;
                                                           ^