View Compilation Error

0_0_33516513_11311.cpp: In function 'int main()':
0_0_33516513_11311.cpp:13:23: error: redeclaration of 'int t'
   int temp1,temp2;int t; int p;
                       ^
0_0_33516513_11311.cpp:8:6: note: 'int t' previously declared here
  int t;cin>>t;int in[30100]={0};
      ^
0_0_33516513_11311.cpp:18:35: error: 'memset' was not declared in this scope
   int cnt=0;memset(in,0,sizeof(in));
                                   ^