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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- string a;
- int i,b=0;
- cin>>a;
- for(i=0; i<a.size(); i++)
- {
- if(a[i]=='7')
- b=1;
- }
- if(b==1)
- {
- printf("Yes\n");
- }
- else
- printf("No\n");
- return 0;
- }
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