Compilare: main.cpp: In function 'void bfs(int)': main.cpp:16:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[coada[inc]].size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:10:26: warning: unused variable 'i' [-Wunused-variable] int inc = 1, sf = 1, i; ^ main.cpp: In function 'int main()': main.cpp:30:21: warning: unused variable 'k' [-Wunused-variable] int i, x, y, m, k, t; ^