View Compilation Error

0_0_28417260_27218.cpp: In function 'int main()':
0_0_28417260_27218.cpp:20:21: error: expected ';' before 'if'
                     if(x - i - a[j] >= 0)
                     ^
0_0_28417260_27218.cpp:20:21: error: expected primary-expression before 'if'
0_0_28417260_27218.cpp:20:21: error: expected ')' before 'if'