Compilare: main.cpp: In function 'bool bfs(int)': main.cpp:23:26: warning: suggest parentheses around assignment used as truth value [-Wparentheses] viz[i] = tata[i] = 0; ~~~~~~~~^~~ main.cpp:29:28: 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:63:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < graph[D].size ( ); i++ ){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp:65:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < graph[node].size ( ); j++ ) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:77:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < graph[tata[node]].size ( ); j++ ) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:85:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < graph[node].size ( ); j++ ) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:89:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < graph[D].size ( ); j++ ) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:94:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < graph[tata[node]].size ( ); j++ ) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:99:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < graph[node].size ( ); j++ ) ~~^~~~~~~~~~~~~~~~~~~~~~