/in/foo.cc: In function 'int main()':
/in/foo.cc:45:25: warning: statement has no effect [-Wunused-value]
   45 |                 flag[t] == 1;
      |                 ~~~~~~~~^~~~
/in/foo.cc:59:25: warning: statement has no effect [-Wunused-value]
   59 |                 flag[t] == 1;
      |                 ~~~~~~~~^~~~
/in/foo.cc:73:25: warning: statement has no effect [-Wunused-value]
   73 |                 flag[t] == 1;
      |                 ~~~~~~~~^~~~
/in/foo.cc:87:25: warning: statement has no effect [-Wunused-value]
   87 |                 flag[t] == 1;
      |                 ~~~~~~~~^~~~
/in/foo.cc:10:12: warning: unused variable 'j' [-Wunused-variable]
   10 |     int i, j, k, t, n, end, ans;
      |            ^
/in/foo.cc:10:15: warning: unused variable 'k' [-Wunused-variable]
   10 |     int i, j, k, t, n, end, ans;
      |               ^
/in/foo.cc:10:21: warning: unused variable 'n' [-Wunused-variable]
   10 |     int i, j, k, t, n, end, ans;
      |                     ^
/in/foo.cc:95:13: warning: 'ans' may be used uninitialized [-Wmaybe-uninitialized]
   95 |     cout << ans;
      |             ^~~
/in/foo.cc:10:29: note: 'ans' was declared here
   10 |     int i, j, k, t, n, end, ans;
      |                             ^~~