Compilare: main.cpp:89:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 89 | main() | ^~~~ main.cpp: In function 'int main()': main.cpp:91:10: warning: variable 'sol' set but not used [-Wunused-but-set-variable] 91 | auto sol=[&](bool x) | ^~~