Compilare: main.cpp: In function 'int main()': main.cpp:33:12: warning: right operand of comma operator has no effect [-Wunused-value] 33 | f>>N,M,S; | ^ main.cpp:33:13: warning: right operand of comma operator has no effect [-Wunused-value] 33 | f>>N,M,S; | ^ main.cpp:39:8: warning: 'S' may be used uninitialized [-Wmaybe-uninitialized] 39 | BFS(S); | ~~~^~~ main.cpp:32:13: note: 'S' was declared here 32 | int N,M,S; | ^ main.cpp:34:18: warning: 'M' may be used uninitialized [-Wmaybe-uninitialized] 34 | for(int i=1;i<=M;i++){ | ~^~~ main.cpp:32:11: note: 'M' was declared here 32 | int N,M,S; | ^