Compilare: main.cpp: In function 'void solve2()': main.cpp:98:25: warning: unused variable 'idk' [-Wunused-variable] 98 | int idk; | ^~~ main.cpp:79:13: warning: variable 'p1' set but not used [-Wunused-but-set-variable] 79 | int p1 , p2 , p3 , p4 , x; | ^~ main.cpp:79:18: warning: unused variable 'p2' [-Wunused-variable] 79 | int p1 , p2 , p3 , p4 , x; | ^~ main.cpp:79:23: warning: unused variable 'p3' [-Wunused-variable] 79 | int p1 , p2 , p3 , p4 , x; | ^~ main.cpp:79:28: warning: unused variable 'p4' [-Wunused-variable] 79 | int p1 , p2 , p3 , p4 , x; | ^~ main.cpp: In function 'int main()': main.cpp:207:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 207 | for(int i = 1 ; i < sol.size () - 1 ; ++ i) | ~~^~~~~~~~~~~~~~~~~ main.cpp:212:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 212 | for(int i = 0 ; i < sol.size () - 1 ; ++ i) | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve2()': main.cpp:121:42: warning: 'i3' may be used uninitialized in this function [-Wmaybe-uninitialized] 121 | val [perm [i4]] = x; | ~~~~~~~~^ main.cpp:64:35: warning: 'idk' may be used uninitialized in this function [-Wmaybe-uninitialized] 64 | val [perm [idk]] = 3; | ~~~~~~~~~^ main.cpp:62:30: warning: 'ik' may be used uninitialized in this function [-Wmaybe-uninitialized] 62 | val [perm [ik]] = x; | ~~~~~~~~^