View Compilation Error

0_0_19760542_32585.cpp: In function 'void topu()':
0_0_19760542_32585.cpp:23:12: error: 'ans' was not declared in this scope
            ans[t]=i;
            ^
0_0_19760542_32585.cpp:32:27: error: 'ans' was not declared in this scope
          for(int j=1;j<=a[ans[i]][0];j++)
                           ^