Compilare: user.cpp: In function ‘void adauga(int)’: user.cpp:23:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<h[nr].size(); ++i) ^ user.cpp: In function ‘void scoate(int)’: user.cpp:36:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<h[nr].size(); ++i) ^ user.cpp: In function ‘int gaseste(int)’: user.cpp:53:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<h[nr].size(); ++i) ^ user.cpp: In function ‘void df(int, int)’: user.cpp:66:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[x].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:75:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbore3.in","r",stdin); ^ user.cpp:76:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbore3.out","w",stdout); ^ user.cpp:78:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&sum,&a,&d[1]); ^ user.cpp:81:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&d[i]); ^