View Compilation Error

0_0_17588699_1890.cpp: In function 'int main()':
0_0_17588699_1890.cpp:26:8: error: 'a' was not declared in this scope
    if (a[i]!=a[i-1] && b[i]!=b[i-1])
        ^
0_0_17588699_1890.cpp:31:17: error: 'a' was not declared in this scope
             if (a[i]>a[i-1] || b[i]<b[i-1])
                 ^