Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:17:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v[nod].size();i++) { ^ user.cpp: In function ‘int main()’: user.cpp:59:18: warning: unused variable ‘d4’ [-Wunused-variable] int d1,d2,d3,d4; ^ user.cpp:61:9: warning: variable ‘r1’ set but not used [-Wunused-but-set-variable] int r1,r2,r3,r4; ^ user.cpp:61:18: warning: unused variable ‘r4’ [-Wunused-variable] int r1,r2,r3,r4; ^ user.cpp:56:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("petrica.in","r",stdin); ^ user.cpp:57:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("petrica.out","w",stdout); ^ user.cpp:62:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:64:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&s[i]); ^ user.cpp:66:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&p[i].x,&p[i].y); ^