Compilare: main.cpp:2:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 2 | #import <algorithm> | ^~~~~~ main.cpp:3:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 3 | #import <vector> | ^~~~~~ main.cpp:4:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 4 | #import <map> | ^~~~~~ main.cpp:5:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 5 | #import <set> | ^~~~~~ main.cpp:6:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 6 | #import <deque> | ^~~~~~ main.cpp:7:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 7 | #import <queue> | ^~~~~~ main.cpp:8:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 8 | #import <cassert> | ^~~~~~ main.cpp:10:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 10 | #import <cstring> | ^~~~~~ main.cpp:11:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 11 | #import <cctype> | ^~~~~~ main.cpp:12:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 12 | #import <cstdlib> | ^~~~~~ main.cpp:13:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 13 | #import <stack> | ^~~~~~ main.cpp:14:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 14 | #import<unordered_map> | ^~~~~~ main.cpp: In function 'int dfs2(int)': main.cpp:43:1: warning: no return statement in function returning non-void [-Wreturn-type] 43 | } | ^ main.cpp: At global scope: main.cpp:44:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 44 | main() | ^~~~