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- #include<bits/stdc++.h>
- using namespace std;
- void subString(string s, int n)
- {
- for (int i = 0; i < n; i++)
- for (int len = 1; len <= n - i; len++)
- cout << s.substr(i, len) << endl;
- }
- int main()
- {
- string s = "abcd";
- subString(s,s.length());
- return 0;
- }
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