Compilare: user.cpp: In function ‘void get(int, int&, int&, int&)’: user.cpp:33:19: warning: NULL used in arithmetic [-Wpointer-arith] while(s[i] != NULL && isdigit(s[i])) { ^ user.cpp:40:19: warning: NULL used in arithmetic [-Wpointer-arith] while(s[i] != NULL && isdigit(s[i])) { ^ user.cpp:47:16: warning: NULL used in arithmetic [-Wpointer-arith] while(s[i] != NULL && isdigit(s[i])) { ^ user.cpp:29:9: warning: unused variable ‘len’ [-Wunused-variable] int len, i; ^ user.cpp: In function ‘int main()’: user.cpp:87:20: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘int (*)[1000005]’ [-Wformat=] scanf("%d\n",&w); ^ user.cpp:91:17: warning: NULL used in arithmetic [-Wpointer-arith] while(ln[i] != NULL) { ^ user.cpp:79:35: warning: unused variable ‘len’ [-Wunused-variable] int n, m, i, x, y, num, k, t, len, W, node; ^ user.cpp:79:43: warning: unused variable ‘node’ [-Wunused-variable] int n, m, i, x, y, num, k, t, len, W, node; ^ user.cpp:111:29: warning: ‘W’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(!heap.empty() && t <= W && w[t] < heap.top().cost) ^ /tmp/cc7IF2wi.o: In function `main': user.cpp:(.text.startup+0x85): warning: the `gets' function is dangerous and should not be used.