Compilare: user.cpp: In function ‘void solve()’: user.cpp:64:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t = 0; t < improved.size() ; ++t) { ^ user.cpp:55:13: warning: unused variable ‘w’ [-Wunused-variable] int w = obj[i].w; ^ user.cpp:56:13: warning: unused variable ‘p’ [-Wunused-variable] int p = obj[i].p; ^ user.cpp: In function ‘void read()’: user.cpp:34:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&g); ^ user.cpp:35:62: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i=1;i<=n;i++) scanf("%d%d", &obj[i].w, &obj[i].p); ^ user.cpp: In function ‘int main()’: user.cpp:86:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ruksak.in","r",stdin); ^ user.cpp:87:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ruksak.out","w",stdout); ^