Intervale5

#include <iostream>
#include <fstream>
using namespace std;
int frecv[101];
int main() {
    ifstream cin("intervale5.in");
    ofstream cout("intervale5.out");
    int nr,maxx=-1,minn=1000;
    while(cin>>nr){
        frecv[nr]++;
        if(nr>maxx) maxx=nr;
        if(nr<minn) minn=nr;
    }
    int st,dr,ok=0;
   for(int i=minn;i<=maxx;i++){
       if(frecv[i]==0){
           st=i-1;
           int j=i+1;
           while(j<=maxx && frecv[j]==0){
                j++;
           }
          i=j;
          dr=j;
          if(dr-st+1>0){
           cout<<st<<" "<<dr<<endl;
           ok=1;
       }
       }
   }
   if(ok==0) cout<<"nu exista";
    return 0;
}