Compilare: user.cpp: In function ‘void solve(std::vector<int>, std::vector<int>, int)’: user.cpp:27:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<fii.size();i++) poz[i]=0; ^ user.cpp:28:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<=v.size();i++) cnt[i]=0; ^ user.cpp:29:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<=v.size()+fii.size();i++) vaz[i]=1; ^ user.cpp:41:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<fii.size();j++) ^ user.cpp:42:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;poz[j]<a+fii.size() && poz[j]<v.size() && d[fii[j]][v[poz[j]]]<=lim;poz[j]++) ^ user.cpp:42:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;poz[j]<a+fii.size() && poz[j]<v.size() && d[fii[j]][v[poz[j]]]<=lim;poz[j]++) ^ user.cpp: In function ‘void inc()’: user.cpp:81:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(pars,1,Buffer,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:96:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tcast.in", "r", stdin); ^ user.cpp:97:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tcast.out", "w", stdout); ^ user.cpp:98:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(pars,1,Buffer,stdin); ^