Compilare: main.cpp: In function 'bool bfs(int)': main.cpp:20:26: warning: suggest parentheses around assignment used as truth value [-Wparentheses] viz[i] = tata[i] = 0; ~~~~~~~~^~~ main.cpp:30:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graph[node].size(); i++){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void bfs2(int)': main.cpp:51:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graph[node].size(); i++){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:75:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graph[n].size(); i++){ ~~^~~~~~~~~~~~~~~~~ main.cpp:97:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < graph[i].size(); j++){ ~~^~~~~~~~~~~~~~~~~