View Compilation Error

0_0_20719137_8293.cpp: In function 'int main()':
0_0_20719137_8293.cpp:4:30: error: expected unqualified-id before 'this'
  int s[5010], t, n, i, time, this;
                              ^
0_0_20719137_8293.cpp:9:3: error: invalid use of 'this' in non-member function
   this = 0;
   ^
0_0_20719137_8293.cpp:13:5: error: invalid use of 'this' in non-member function
     this = this%n + 1;
     ^
0_0_20719137_8293.cpp:13:12: error: invalid use of 'this' in non-member function
     this = this%n + 1;
            ^
0_0_20719137_8293.cpp:14:15: error: invalid use of 'this' in non-member function
     while (!s[this])this = this%n + 1;
               ^
0_0_20719137_8293.cpp:14:21: error: invalid use of 'this' in non-member function
     while (!s[this])this = this%n + 1;
                     ^
0_0_20719137_8293.cpp:14:28: error: invalid use of 'this' in non-member function
     while (!s[this])this = this%n + 1;
                            ^
0_0_20719137_8293.cpp:16:6: error: invalid use of 'this' in non-member function
    s[this] = 0;
      ^