Compilare: user.cpp: In function ‘int main()’: user.cpp:103:17: warning: comparison with string literal results in unspecified behavior [-Waddress] if(verdict == "DA") { ^~~~ user.cpp: In function ‘void ReadInput()’: user.cpp:22:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); graph.resize(2 * n + 1); ^ user.cpp:25:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int u, v; scanf("%d%d", &u, &v); ^