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- #include <bits/stdc++.h>
- #define pb push_back
- #define mp make_pair
- using namespace std;
- typedef unsigned int uint;
- typedef long long int llint;
- typedef pair<int, int> pii;
- llint solve(llint a);
- //========================\\main//========================//
- int main()
- {
- llint a;
- while(cin >> a)
- {
- cout << solve(a) << '\n';
- } // end of while
- return 0;
- }
- //========================\\main//========================//
- llint solve(llint a)
- {
- llint sumMod = 0;
- llint res = 1;
- int temp;
- for(llint i = 0; ; i++)
- {
- sumMod += (res % a);
- // cout << (int)myPow(10, i) << '\n';
- if( (sumMod % a) == 0 ) return i + 1;
- res = res * 10;
- } // end of for
- }///////////////////////////////////////////////////////////
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