View Compilation Error

0_0_17030863_17984.cpp: In function 'void solve(int)':
0_0_17030863_17984.cpp:22:2: error: 'ans' was not declared in this scope
  ans[i]=4;t4++;
  ^
0_0_17030863_17984.cpp:31:44: error: 'b' was not declared in this scope
   for(int tttt=0;tttt<c;tttt++) x1*=10,x1+=b[tttt];
                                            ^
0_0_17030863_17984.cpp:40:44: error: 'b' was not declared in this scope
   for(int tttt=0;tttt<c;tttt++) x1*=10,x1+=b[tttt];
                                            ^
0_0_17030863_17984.cpp:51:46: error: 'b' was not declared in this scope
     for(int tttt=0;tttt<c;tttt++) x1*=10,x1+=b[tttt];
                                              ^