3 5 7
5
1 #include<iostream> 2 #include<cstdio> 3 #include<cmath> 4 using namespace std; 5 int r,x,p; 6 int main() 7 { 8 cin>>r>>x>>p; 9 printf("%d",20-r-x-p); 10 return 0; 11 }
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