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- #include <iostream>
- using namespace std;
- int main()
- {
- int n;
- while (scanf("%d",&n )!=EOF)
- {
- int i;
- for(i = 1;i*(i+1)<=n*2;i++);
- int k = n-i*(i-1)/2;
- cout << k << "/" << i - k + 1 << endl;
- }
- return 0;
- }
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