dango3.cpp: In function 'void solve(std::vector<int>, int, int)':
dango3.cpp:10:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
10 | if (a.size()==n) {
| ~~~~~~~~^~~
dango3.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | for (int i=0;i<a.size();i++) {
| ~^~~~~~~~~
dango3.cpp:19:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
19 | if (cur_ans.size()==n*gr) break;
| ~~~~~~~~~~~~~~^~~~~~
dango3.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
26 | for (int i=0;i<a.size();i++) {
| ~^~~~~~~~~