3n+1 Time limit exit

#include <iostream>
#include <cstdio>


using  namespace  std;
int main() {


    int memo[1000000] = {};


    while (true) {
        int cycle = 0;

        int m,n;
        cin>>m>>n;

        for (int i = m; i <= n; ++i) {

            int n = i;
            // cout << n << " ";

            int count = 1;


            if (memo[n] == 0) {

                while (n != 1) {

                    //if (memo[n] != 0) {

                        if (n % 2 == 1)
                            n = 3 * n + 1;
                        else
                            n = n / 2;
                        //  cout << n << " ";
                        count++;
                   // } else {
                        //count += memo[n];
                      //  break;
                    //}
                }
            }
            memo[i] = count;

            // cout << ": " << count<<endl;
            if (cycle < count)
                cycle = count;

        }
        cout << m << " " << n << " " << cycle << endl;

        for (int i = 1; i <=1000 ; ++i) {
            cout<<i<<" : "<<memo[i]<<", ";
        }
    }





    return 0;
}