Compilare: user.cpp: In function ‘void neighbours(int, int)’: user.cpp:23:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(i+lin[q]>0&&i+lin[q]<=n&&j+col[q]>0&&j+col[q]<=m) ^ user.cpp: In function ‘void new_fill(int)’: user.cpp:38:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:76:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[comp].size();i++){ ^ user.cpp:43:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zone2.in","r",stdin); ^ user.cpp:44:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zone2.out","w",stdout); ^ user.cpp:47:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n",&n,&m,&k); ^ user.cpp:50:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&ch); ^ user.cpp:53:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^