foo.cc: In function 'int main()':
foo.cc:16:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
16 | for(int i = 0; i < v.size() - 1; i ++){
| ~~^~~~~~~~~~~~~~
foo.cc:17:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
17 | for(int j = i + 1; j < v.size(); j ++){
| ~~^~~~~~~~~~
foo.cc:21:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | for(int i = 0; i < v.size(); i ++){
| ~~^~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务