View Compilation Error

0_0_17541230_8112.cpp: In function 'int main()':
0_0_17541230_8112.cpp:16:21: error: expected ')' before ']' token
         else if(a[3]]>=a[0]+a[1]+a[2])
                     ^
0_0_17541230_8112.cpp:16:21: error: expected primary-expression before ']' token