Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < edge[nod].size(); i++ ) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:30:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] fin >> s + 1; ~~^~~ main.cpp:44:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < arr.size(); i++ ){ ~~^~~~~~~~~~~~ main.cpp:46:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < edge[nod].size(); j++ ) ~~^~~~~~~~~~~~~~~~~~ main.cpp:54:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < arr.size(); i++ ){ ~~^~~~~~~~~~~~ main.cpp:56:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < edge[nod].size(); j++ ) ~~^~~~~~~~~~~~~~~~~~ main.cpp:61:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < arr.size(); i++ ){ ~~^~~~~~~~~~~~ main.cpp:64:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < edge[nod].size(); j++ ) ~~^~~~~~~~~~~~~~~~~~