Compilare: main.cpp: In function 'bool ok()': main.cpp:12:1: warning: no return statement in function returning non-void [-Wreturn-type] 12 | } | ^ main.cpp: In function 'int main()': main.cpp:25:24: warning: comparison of integer expressions of different signedness: 'std::deque<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 25 | while(d.size() > u){ | ~~~~~~~~~^~~ main.cpp:26:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 26 | auto [a , b] = d.front(); | ^ main.cpp:30:24: warning: comparison of integer expressions of different signedness: 'std::deque<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 30 | while(d.size() > l){ | ~~~~~~~~~^~~ main.cpp:31:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 31 | auto [a , b] = d.front(); | ^ main.cpp:38:21: warning: comparison of integer expressions of different signedness: 'std::deque<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 38 | if(d.size() >= l) | ~~~~~~~~~^~~~