h3. Explicaţie

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Pentru arborele initial:
 
Eliminam in ordine nodurile 1 : 1/3 * val[1];
Eliminam in ordine nodurile 2 , 1 : 1/3 * 1/2 * (val[2] + val[1]);
Eliminam in ordine nodurile 3 , 1: 1/3 * 1/2 * (val[3] + val[1]);
Eliminam in ordine nodurile 2 , 3 , 1 : 1/3 * 1/2 * 1 * (val[2] + val[3] + val[1]);
Eliminam in ordine nodurile 3 , 2 , 1: 1/3 * 1/2 * 1 * (val[3] + val[2] + val[1]);

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