View Compilation Error

0_0_26110500_15124.cpp: In function 'int main()':
0_0_26110500_15124.cpp:9:17: error: 't' was not declared in this scope
     scanf("%d",&t);
                 ^
0_0_26110500_15124.cpp:23:9: error: 'ans' was not declared in this scope
         ans=-1;
         ^