Compilare: main.cpp: In constructor 'AC::AC()': main.cpp:21:21: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] 21 | memset(Edge,NULL,sizeof(Edge)); | ^~~~ In file included from /usr/include/c++/10/cstring:42, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:48, from main.cpp:1: /usr/include/string.h:61:37: note: declared here 61 | extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1)); | ~~~~^~~ main.cpp: In function 'void Bfss(AC*)': main.cpp:86:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<AC*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for(int j=0; j<levels[i].size(); j++) | ~^~~~~~~~~~~~~~~~~ main.cpp:90:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 90 | for(int z=0; z<Node->nodes.size(); z++) Answer[Node->nodes[z]]=Node->n0; | ~^~~~~~~~~~~~~~~~~~~