Compilare: user.cpp: In function ‘void paliCent(int, int, int, int)’: user.cpp:28:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define SZ(x) x.size() ^ user.cpp:23:38: note: in definition of macro ‘FOR’ #define FOR(i,n) for (int i = 0 ; i< n;i++) ^ user.cpp:44:11: note: in expansion of macro ‘SZ’ FOR(i,SZ(adj[x])) ^ user.cpp:28:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define SZ(x) x.size() ^ user.cpp:23:38: note: in definition of macro ‘FOR’ #define FOR(i,n) for (int i = 0 ; i< n;i++) ^ user.cpp:45:11: note: in expansion of macro ‘SZ’ FOR(j,SZ(adj[y])) ^ user.cpp: In function ‘int main()’: user.cpp:28:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define SZ(x) x.size() ^ user.cpp:23:38: note: in definition of macro ‘FOR’ #define FOR(i,n) for (int i = 0 ; i< n;i++) ^ user.cpp:94:11: note: in expansion of macro ‘SZ’ FOR(j,SZ(adj[i])) ^ user.cpp:62:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d\n",&n); ^ user.cpp:70:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d\n",&x,&y); ^ user.cpp:78:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c ",&ch[i]); ^ user.cpp:80:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c",&ch[i]); ^