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Cod sursa(job #10751)
#include <conio.h>
#include <iostream.h>
#include <fstream.h>
long int n;
int T,c1,cifra,j,uc;
int mat[2][10];
int main()
{ mat[0][0]=0;mat[0][1]=1;mat[0][2]=5;mat[0][3]=2;mat[0][4]=8;
mat[0][5]=3;mat[0][6]=9;mat[0][7]=2;mat[0][8]=8;mat[0][9]=7;
mat[1][0]=0;mat[1][1]=1;mat[1][2]=7;mat[1][3]=0;mat[1][4]=6;
mat[1][5]=1;mat[1][6]=7;mat[1][7]=4;mat[1][8]=8;mat[1][9]=7;
ifstream f;ofstream g;
f.open("cifra.in");
g.open("cifra.out");
f>>T;
for (j=1;j<=T;j++)
{
f>>n;
cifra=n%100;
c1=cifra%10;
cifra=cifra/10;
uc=7*cifra+mat[cifra%2][c1];
g<<(uc%10)<<endl;
}
f.close();
g.close();
return 0;
}