Compilare: user.cpp: In function ‘void Plus(int, int)’: user.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<H[st].size()&&ok;i++) ^ user.cpp:12:8: warning: unused variable ‘j’ [-Wunused-variable] int i,j,st,ok; ^ user.cpp: In function ‘int main()’: user.cpp:36:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<H[i].size();j++) ^ user.cpp:40:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<H[i].size();j++) ^ user.cpp:24:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pariuri.in","r",stdin); ^ user.cpp:25:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pariuri.out","w",stdout); ^ user.cpp:26:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:28:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&nr); ^ user.cpp:30:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^