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Cod sursa(job #550598)
#include<fstream>
#include<iostream>
using namespace std;
int a[101],c;
int main()
{
int t;
char x[101];
ifstream f("cifra.in");
ofstream g("cifra.out");
a[1]=1;
int s;
for(int i=2;i<=101;i++)
{
s=1;
for(int j=1;j<=i;j++)
s=s*i%10;
a[i]=(a[i-1]+s)%10;
}
f>>t;
for(int i=1;i<=t;i++)
{
f>>x;
if(strlen(x)>2)
strcpy(x,x+(strlen(x)-2));
c=atoi(x);
g<<a[c]<<"\n";
}
f.close();
g.close();
return 0;
}