View Compilation Error

0_0_29002728_19280.cpp: In function 'int main()':
0_0_29002728_19280.cpp:66:29: error: expected ';' before 'for'
         build(1,1,n)        for(ll i=1;i<=n;i++){
                             ^
0_0_29002728_19280.cpp:66:40: error: 'i' was not declared in this scope
         build(1,1,n)        for(ll i=1;i<=n;i++){
                                        ^