Tina's trainer have given her two positive integers U and V. Now her task is ti find the number of pairs of positive integers (X,Y) such that 1≤X≤U, 1≤Y≤V and X+Y is even.Tina is finding difficult to understand the problem.Can you help her solving the problem?

 #include <stdio.h>

int main()

{

    int U,V;

    scanf("%d%d",&U,&V);

    printf("%d",(((U*V)+1)/2));

return 0;

}

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