Compilare: main.cpp: In function 'int process(int, int, int, int)': main.cpp:61:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:94:21: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] g << sol << '\n'; ^~~~