Compilare: main.cpp: In member function 'void Solution::senat()': main.cpp:166:36: warning: NULL used in arithmetic [-Wpointer-arith] 166 | for(int j = 0; s[j] != NULL;) | ^~~~ main.cpp:152:19: warning: unused variable 'e' [-Wunused-variable] 152 | int n, m, e; | ^ main.cpp:160:13: warning: unused variable 'x' [-Wunused-variable] 160 | int x, y; | ^ main.cpp:160:16: warning: unused variable 'y' [-Wunused-variable] 160 | int x, y; | ^