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Cod sursa(job #126099)
#include<fstream.h>
#define cmax 200
ifstream f("cifra.in");
ofstream g("cifra.out");
int a[]={1, 5, 2, 8, 3, 9, 2, 8, 7}, i, cf, t, n, nr;
char sir[cmax];
int main()
{
f>>t;
f.getline(sir,200);
for(i=1; i<=t; i++){
f.getline(sir,200);
nr=strlen(sir);
if(nr>1) cf=7;
else cf=0;
n=sir[nr-1]-'0';
cf=cf+a[n%10-1];
g<<cf%10<<'\n';
}
f.close();
g.close();
return 0;
}