Compilare: user.cpp: In function ‘void elimin(int, std::vector<int>&)’: user.cpp:13:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<nod.size();i++) ^ user.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i<nod.size()-1;i++) ^ user.cpp: In function ‘void caz1()’: user.cpp:27:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[poz].size();i++) ^ user.cpp:52:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<nod[poz].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:89:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("puzzle2.in","r",stdin); ^ user.cpp:90:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:99:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^