Compilare: user.cpp: In function ‘void dfs(int, int, int, int*)’: user.cpp:42: warning: name lookup of ‘i’ changed user.cpp:34: warning: matches this ‘i’ under ISO standard rules user.cpp:41: warning: matches this ‘i’ under old rules user.cpp:52: warning: name lookup of ‘i’ changed user.cpp:46: warning: matches this ‘i’ under ISO standard rules user.cpp:50: warning: matches this ‘i’ under old rules