Compilare: main.cpp: In function 'std::vector<int> getleft(int*, int)': main.cpp:32:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for(int i = 1 , j = 0 ; i <= n && j < r.size () ; ){ | ~~^~~~~~~~~~~ main.cpp: In function 'std::vector<int> getright(int*, int)': main.cpp:55:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for(int i = 1 , j = 0 ; i <= n && j < r.size () ; ){ | ~~^~~~~~~~~~~ main.cpp: In function 'void solve2()': main.cpp:112:21: warning: unused variable 'lind' [-Wunused-variable] 112 | int lind = perm [j]; | ^~~~ main.cpp:108:17: warning: unused variable 'lind' [-Wunused-variable] 108 | int lind (-1); | ^~~~ main.cpp:79:27: warning: variable 'fq' set but not used [-Wunused-but-set-variable] 79 | static int perm [5] , fq [5]; | ^~ main.cpp: In function 'int main()': main.cpp:169:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 169 | for(int i = 1 ; i < sol.size () - 1 ; ++ i) | ~~^~~~~~~~~~~~~~~~~ main.cpp:174:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 174 | for(int i = 0 ; i < sol.size () - 1 ; ++ i) | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve2()': main.cpp:140:54: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized] 140 | val [perm [i]] = 2 * n - 1 - val [ind]; | ~~~~~~~~^