doll.cpp: In function 'void ansawer(std::vector<int>, std::vector<int>, std::vector<int>)':
doll.cpp:25:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   25 |  for(auto e : a)cout << e << " ";cout << endl;
      |  ^~~
doll.cpp:25:34: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   25 |  for(auto e : a)cout << e << " ";cout << endl;
      |                                  ^~~~
doll.cpp:5:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define FOR(i,n) for(int i = 0;i<n;i++)
......
   26 |  FOR(i,b.size()){
      |      ~~~~~~~~~~                  
doll.cpp:26:2: note: in expansion of macro 'FOR'
   26 |  FOR(i,b.size()){
      |  ^~~
doll.cpp: In function 'int solve(std::vector<int>)':
doll.cpp:5:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define FOR(i,n) for(int i = 0;i<n;i++)
......
   34 |  FOR(i,nums.size()){
      |      ~~~~~~~~~~~~~               
doll.cpp:34:2: note: in expansion of macro 'FOR'
   34 |  FOR(i,nums.size()){
      |  ^~~