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100 and 99 g, weights - All-Russian MO 2002 Regional (R4) 8.8

Source:

September 17, 2024
weighingscombinatorics

Problem Statement

Among 1818 parts placed in a row, some three in a row weigh 9999 g each, and all the rest weigh 100100 g each. On a scale with an arrow, identify all 9999-gram parts.