View Compilation Error

0_0_27495334_170.cpp: In function 'int main()':
0_0_27495334_170.cpp:74:29: error: expected ')' before '[' token
       else if(n%3==0 && && a[n-1]==1 && a[n]>1) puts("No");
                             ^
0_0_27495334_170.cpp:74:28: error: label 'a' used but not defined
       else if(n%3==0 && && a[n-1]==1 && a[n]>1) puts("No");
                            ^