View Compilation Error

0_0_18200658_14702.cpp: In function 'int main()':
0_0_18200658_14702.cpp:96:11: error: 'arc' was not declared in this scope
    memset(arc,0,sizeof arc);
           ^
0_0_18200658_14702.cpp:99:4: error: 'tot' was not declared in this scope
    tot=0;
    ^
0_0_18200658_14702.cpp:106:4: error: 'ans' was not declared in this scope
    ans = 0;
    ^