Compilare: user.cpp: In function ‘int main()’: user.cpp:22:21: warning: unused variable ‘j’ [-Wunused-variable] int n, m, p, i, j, x, y, k, s; ^ user.cpp: In function ‘void bfs()’: user.cpp:62:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0; i < v[ x ].size(); ++i ){ ^ user.cpp:53:9: warning: unused variable ‘n’ [-Wunused-variable] int n, i, x, k; ^ user.cpp: In function ‘int main()’: user.cpp:19:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("berarii2.in","r",stdin); ^ user.cpp:20:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("berarii2.out","w",stdout); ^ user.cpp:24:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&p); ^ user.cpp:26:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp:31:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k); ^