/in/foo.cc:42:20: error: stray '@' in program
   42 |  qq913653500 LV 10 @ 8 年前
      |                    ^
/in/foo.cc:39:1: error: 'Copy' does not name a type
   39 | Copy
      | ^~~~
/in/foo.cc:46:5: error: redefinition of 'int n'
   46 | int n,m,Time,map[21][21],ans = 0;
      |     ^
/in/foo.cc:6:5: note: 'int n' previously declared here
    6 | int n,m,Time,map[21][21],ans = 0;
      |     ^
/in/foo.cc:46:7: error: redefinition of 'int m'
   46 | int n,m,Time,map[21][21],ans = 0;
      |       ^
/in/foo.cc:6:7: note: 'int m' previously declared here
    6 | int n,m,Time,map[21][21],ans = 0;
      |       ^
/in/foo.cc:46:9: error: redefinition of 'int Time'
   46 | int n,m,Time,map[21][21],ans = 0;
      |         ^~~~
/in/foo.cc:6:9: note: 'int Time' previously declared here
    6 | int n,m,Time,map[21][21],ans = 0;
      |         ^~~~
/in/foo.cc:46:14: error: redefinition of 'int map [21][21]'
   46 | int n,m,Time,map[21][21],ans = 0;
      |              ^~~
/in/foo.cc:6:14: note: 'int map [21][21]' previously declared here
    6 | int n,m,Time,map[21][21],ans = 0;
      |              ^~~
/in/foo.cc:46:26: error: redefinition of 'int ans'
   46 | int n,m,Time,map[21][21],ans = 0;
      |                          ^~~
/in/foo.cc:6:26: note: 'int ans' previously defined here
    6 | int n,m,Time,map[21][21],ans = 0;
      |                          ^~~
/in/foo.cc:47:13: error: redefinition of 'void dfs(int, int, int)'
   47 | inline void dfs(int nowtime,int x,int y) {
      |             ^~~
/in/foo.cc:7:13: note: 'void dfs(int, int, int)' previously defined here
    7 | inline void dfs(int nowtime,int x,int y) {
      |             ^~~
/in/foo.cc:65:5: error: redefinition of 'int main()'
   65 | int main() {
      |     ^~~~
/in/foo.cc:30:5: note: 'int main()' previously defined here
   30 | int main() {
      |     ^~~~