Compilare: user.cpp: In function ‘int main()’: user.cpp:11:11: warning: variable ‘fin’ set but not used [-Wunused-but-set-variable] FILE *fin, *fout; ^~~ user.cpp:11:17: warning: variable ‘fout’ set but not used [-Wunused-but-set-variable] FILE *fin, *fout; ^~~~ user.cpp:14:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &V, &N); ^ user.cpp:16:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1; i<=N; i++) {scanf("%d", &numList[i]); if(i==1)groupList[++vf].second=numList[i]; else if(numList[i]!=numList[i-1]){vf++; groupList[vf].second=numList[i];} groupList[vf].first++; if(groupList[vf].first>maxgroup)maxgroup=groupList[vf].first;} ^