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纯数学解法...#include <iostream>
using namespace std;
int main ()
{
int n,k[999];
cin>>n;
for (int i=0;i<n;i++)
{
cin>>k[i];
int w=0;
for (int j=1;j<=k[i];j++)
{
w+=j*(j+1)*(j+2)/2;
}
cout<<i+1<<" "<<k[i]<<" "<<w<<endl;
}
return 0;
}
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