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:30:28: 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:48:9: warning: unused variable 'm' [-Wunused-variable] { int m, x, y, c, z, sol = 0, i; ^ main.cpp:48:12: warning: unused variable 'x' [-Wunused-variable] { int m, x, y, c, z, sol = 0, i; ^ main.cpp:48:15: warning: unused variable 'y' [-Wunused-variable] { int m, x, y, c, z, sol = 0, i; ^ main.cpp:48:18: warning: unused variable 'c' [-Wunused-variable] { int m, x, y, c, z, sol = 0, i; ^ main.cpp:48:21: warning: unused variable 'z' [-Wunused-variable] { int m, x, y, c, z, sol = 0, i; ^