【例题 7-3 UVA - 10976】Fractions Again?!

/*
    1.Shoud it use long long ?
    2.Have you ever test several sample(at least therr) yourself?
    3.Can you promise that the solution is right? At least,the main ideal
    4.use the puts("") or putchar() or printf and such things?
    5.init the used array or any value?
    6.use error MAX_VALUE?
*/

#include <bits/stdc++.h>
using namespace std;

int k;
vector <pair<int,int> > v;

int main(){
    #ifdef LOCAL_DEFINE
        freopen("F:\\c++source\\rush_in.txt", "r", stdin);
    #endif
    ios::sync_with_stdio(0),cin.tie(0);
    while (cin >> k){
        v.clear();
        for (int y = k+1;y <= 2*k;y++){
            int fenzi = k*y;
            int fenmu = y-k;
            if (fenzi%fenmu==0){
                int x = fenzi/fenmu;
                if (x>=y) v.push_back({x,y});
            }
        }
        cout << v.size() << endl;
        for (int i = 0;i < (int)v.size();i++){
                int x = v[i].first,y = v[i].second;
            cout <<"1/"<<k<<" = 1/"<<x<<" + 1/"<<y<<endl;
        }
    }
    return 0;
}