Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:62:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:117:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<g[v1[j]].size();k++) ^ user.cpp:87:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elicoptere.in","r",stdin); ^ user.cpp:88:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elicoptere.out","w",stdout); ^ user.cpp:91:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&tip); ^ user.cpp:92:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:96:66: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int j=1;j<=3;j++) scanf("%d%d",&v[i][j].x,&v[i][j].y); ^