=MAX(0;MIN(C$2;C12)-MAX(B$2;B12))+MAX(0;MIN(C$2;C13)-MAX(B$2;B13))+MAX(0;MIN(C$2;C14)-MAX(B$2;B14))+MAX(0;MIN(C$2;C15)-MAX(B$2;B15))
=MAX(0;MIN(C$2;C12)-MAX(B$2;B12)+1)+MAX(0;MIN(C$2;C13)-MAX(B$2;B13)+1)+MAX(0;MIN(C$2;C14)-MAX(B$2;B14)+1)+MAX(0;MIN(C$2;C15)-MAX(B$2;B15)+1)
[COLOR=DarkSlateGray][B]=SOMME(C2-B2+C12:C15-B12:B15-ABS(B2-B12:B15)-ABS(C2-C12:C15)+2+ABS(C2-B2+C12:C15-B12:B15-ABS(B2-B12:B15)-ABS(C2-C12:C15)+2))/4[/B][/COLOR]