Raw-yield distribution as a function of the BDT-based selection employed in the $\chi^{2}$-minimization procedure adopted for the determination of $f_{\rm nonprompt}$ of $\Dzero$ in $2 < \pt < 4$ GeV/$c$ (top left panel), $\Lambda_{\rm c}^+ \rightarrow {\rm pK^-}\pi^+$ in $4 < \pt < 6$ GeV/$c$ (top right panel), and $\Lambda_{\rm c}^+ \rightarrow {\rm pK^0_S}$ in $6 < \pt < 8$ GeV/$c$ (bottom left panel). Bottom right panel: $f_{\rm nonprompt}$ fraction as function as $\pt$ obtained for the set of selection criteria adopted in the analysis of for non-prompt $\Dzero$, $\Lambda_{\rm c}^+ \rightarrow {\rm pK^-}\pi^+$, and $\Lambda_{\rm c}^+ \rightarrow {\rm pK^0_S}$ hadrons.