View Compilation Error

0_0_33674295_29082.cpp: In function 'void init_w(int)':
0_0_33674295_29082.cpp:94:22: error: expected primary-expression before '=' token
   for (ri i = 2; i < =lm; ++i) {
                      ^
0_0_33674295_29082.cpp: In function 'int main()':
0_0_33674295_29082.cpp:223:18: error: expected ';' before ')' token
  for(int i=0;i<=n)
                  ^
0_0_33674295_29082.cpp:225:17: error: 'pre' was not declared in this scope
  for(int i=1;i<=pre;++i){
                 ^