View Compilation Error

0_0_30555611_26125.cpp: In function 'int main()':
0_0_30555611_26125.cpp:34:8: error: 'c' was not declared in this scope
     if(c[i][j]=='w' && (a[i]+b[j])%2==0) s++;
        ^
0_0_30555611_26125.cpp:35:8: error: 'c' was not declared in this scope
     if(c[i][j]=='b' && (a[i]+b[j])%2==1) s++;
        ^