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| #include <iostream> | |
| using namespace std; | |
| int p(int, int); | |
| int main() | |
| { | |
| int x, n; | |
| cin>>n; | |
| cin>>x; | |
| int be =2; | |
| int s=0; | |
| int power = 2; | |
| for(int i=0;i<n;i++){ | |
| if(i%2==0){ | |
| int something = p(x,power); | |
| s = s+(something/be); | |
| be =be +2; | |
| power++; | |
| } | |
| else{ | |
| if(i==0){ | |
| cout<<"1"; | |
| s = s+1; | |
| } | |
| else{ | |
| int placeholder = p(x,power); | |
| power++; | |
| s = s+(placeholder/be); | |
| be = be=2; | |
| } | |
| } | |
| } | |
| cout<<s; | |
| return 0; | |
| } | |
| int p(int a,int b){ | |
| int res = a; | |
| for(int i=0;i<(b-1);i++){ | |
| res = res + res; | |
| } | |
| return res; | |
| } |
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