Compilare: main.cpp: In function 'void dfs(int)': main.cpp:27:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < g[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:35: warning: unused variable 'st' [-Wunused-variable] int cer , n , m , i , x , y , st , dr , mid , p2; ^~ main.cpp:41:45: warning: unused variable 'mid' [-Wunused-variable] int cer , n , m , i , x , y , st , dr , mid , p2; ^~~ main.cpp:117:9: warning: unused variable 'cc' [-Wunused-variable] int cc = 0; ^~ main.cpp:43:41: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&cer , &n , &m); ^ main.cpp:46:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x,&y); ^