Compilare: main.cpp: In function 'int main()': main.cpp:63:32: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 63 | while(v[l].size() + nr <= k){ | ~~~~~~~~~~~~~~~~~^~~~ main.cpp:65:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for(int i = 0; i < v[l].size(); i++){ | ~~^~~~~~~~~~~~~ main.cpp:82:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | for(int i = 0; i < aux.size(); i++){ | ~~^~~~~~~~~~~~ main.cpp:102:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | for(int i = 0; i < aux.size(); i++){ | ~~^~~~~~~~~~~~ main.cpp:63:18: warning: 'l' may be used uninitialized [-Wmaybe-uninitialized] 63 | while(v[l].size() + nr <= k){ | ^ main.cpp:47:16: note: 'l' was declared here 47 | int a, l; | ^