foo.cc:7:9: error: expected initializer before 'for'
    7 |         for(int i=c[t-1]+1;i<=n;i++){
      |         ^~~
foo.cc:7:28: error: 'i' does not name a type
    7 |         for(int i=c[t-1]+1;i<=n;i++){
      |                            ^
foo.cc:7:33: error: 'i' does not name a type
    7 |         for(int i=c[t-1]+1;i<=n;i++){
      |                                 ^
foo.cc:28:1: error: expected declaration before '}' token
   28 | }
      | ^
foo.cc: In function 'int main()':
foo.cc:35:9: error: 'dfs' was not declared in this scope; did you mean 'ffs'?
   35 |         dfs(1);
      |         ^~~
      |         ffs

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