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Cod sursa(job #25807)
#include<fstream.h>
#include<math.h>
int main()
{
int a[50][50],i,j,suma=0,x,n,v[10000];
ifstream f("cifra.in");
f>>n;
for(i=1;i<=n;i++)
f>>v[i];
f.close();
ofstream g("cifra.out");
for(i=0;i<=9;i++)
for(j=1;j<=4;j++)
{ x=pow(i,j);
a[i][j%4]=x%10;
}
for(i=1;i<=9;i++) a[i][0]=a[i][4];
for(i=1;i<=n;i++)
{suma=0;
for(j=1;j<=v[i];j++)
suma+=a[j%10][j%4];
g<<suma%10<<"\n";
}
g.close();
return 0;
}