Compilare: user.cpp: In function ‘int main()’: user.cpp:53:21: warning: narrowing conversion of ‘x’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] coada.push({x,1}); ^ user.cpp:66:67: warning: narrowing conversion of ‘muchii[((int)abc.pereche::nod)].std::vector<_Tp, _Alloc>::operator[]<int, std::allocator<int> >(((std::vector<int>::size_type)i))’ from ‘__gnu_cxx::__alloc_traits<std::allocator<int> >::value_type {aka int}’ to ‘short int’ inside { } [-Wnarrowing] coada.push({muchii[abc.nod][i],abc.distanta+1}); ^ user.cpp:66:64: warning: narrowing conversion of ‘(((int)abc.pereche::distanta) + 1)’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] coada.push({muchii[abc.nod][i],abc.distanta+1}); ^ user.cpp:74:25: warning: narrowing conversion of ‘y’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] coada.push({y,y_val}); ^ user.cpp:74:25: warning: narrowing conversion of ‘y_val’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] user.cpp:84:64: warning: narrowing conversion of ‘muchii[((int)abc.pereche::nod)].std::vector<_Tp, _Alloc>::operator[]<int, std::allocator<int> >(((std::vector<int>::size_type)i))’ from ‘__gnu_cxx::__alloc_traits<std::allocator<int> >::value_type {aka int}’ to ‘short int’ inside { } [-Wnarrowing] coada.push({muchii[abc.nod][i],pass[abc.nod]-1}); ^ user.cpp:84:61: warning: narrowing conversion of ‘(((int)pass[((int)abc.pereche::nod)]) + -1)’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] coada.push({muchii[abc.nod][i],pass[abc.nod]-1}); ^ user.cpp:30:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("graf.in","r",stdin); ^ user.cpp:31:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("graf.out","w",stdout); ^ user.cpp:33:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d\n",&n,&m,&x,&y); ^ user.cpp:38:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccr5FJMO.o: In function `main': user.cpp:(.text.startup+0xa8): warning: the `gets' function is dangerous and should not be used.