Compilare: user.cpp: In function ‘void add(int)’: user.cpp:11:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<table[k].size(); i++) ^ user.cpp: In function ‘int find(int)’: user.cpp:17:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<table[k].size(); i++) ^ user.cpp: In function ‘void remove(int)’: user.cpp:25:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<table[k].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:30:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in","r",stdin); ^ user.cpp:31:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out","w",stdout); ^ user.cpp:32:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:34:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&op,&x); ^