View Compilation Error

0_0_30731069_9864.cpp: In function 'int f(int, int)':
0_0_30731069_9864.cpp:13:12: error: expected ';' before ')' token
  for(x;x/=k) a[++cnt]=x%k; 
            ^
0_0_30731069_9864.cpp: In function 'void init()':
0_0_30731069_9864.cpp:41:14: error: 'j' was not declared in this scope
    if(num[i][j]>MAX) break;
              ^
0_0_30731069_9864.cpp: At global scope:
0_0_30731069_9864.cpp:44:1: error: expected declaration before '}' token
 }
 ^