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- #include <bits/stdc++.h>
- using namespace std;
- #define ll long long
- #define test int t; cin>>t; for(int cs=1;cs<=t;cs++)
- string multi(string nums1,string nums2)
- {
- int l1 = nums1.size();
- int l2 = nums2.size();
- string str( l1 + l2, '0');
- for(int i = l1-1; i >= 0; i--)
- {
- for(int j = l2-1; j >= 0; j--)
- {
- int p = (nums1[i]-'0')*(nums2[j]-'0') + (str[i+j+1]-'0');
- str[i+j+1] = p%10 + '0';
- str[i+j] += p/10;
- }
- }
- for(int i = 0; i < l1+l2; i++)
- {
- if(str[i]!= '0')
- {
- return str.substr(i);
- }
- }
- return "0";
- }
- string addd(string a,string c)
- {
- ll s1,s2,l,i,j,k=0;
- string sum="";
- reverse(a.begin(),a.end());
- reverse(c.begin(),c.end());
- s1=a.size();
- s2=c.size();
- l=max(s1,s2);
- for(i=0; i<l; i++)
- {
- if(i<s1)
- {
- k+=(a[i]-'0');
- }
- if(i<s2)
- {
- k+=(c[i]-'0');
- }
- sum+=((k%10)+'0');
- k/=10;
- }
- if(k)
- {
- sum+=(k+'0');
- }
- reverse(sum.begin(),sum.end());
- for(i = 0; i <sum.size(); i++)
- {
- if(sum[i]!= '0')
- {
- return sum.substr(i);
- }
- }
- return "0";
- }
- int main()
- {
- ios_base::sync_with_stdio(0);
- cin.tie(0);cout.tie(0);
- ll a,d,e,i,j,k,l;
- string c;
- while(cin>>a>>c)
- {
- string x="1";
- string y="0";
- for(i=1;i<=a;i++)
- {
- string x="1";
- for(j=1;j<=i;j++)
- {
- x=multi(x,c);
- }
- x=multi(x,to_string(i));
- y=addd(y,x);
- }
- cout<<y<<endl;
- }
- return 0;
- }
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