എܠ: NP ࠔ ▶ ݱ࣮తͳ࣌ؒͰ࠷దղΛٻ ΊΒΕͳ͍ͱ৴͡ΒΕͯ ͍Δ ▶ ex. φοϓαοΫ, ࠷େΫϦʔΫ ▶ NP શΛશͯؼணͰ͖ ΔͨΊɺ1 ͭͷ͕ղ͚Δ ͜ͱʹඇৗʹՁ͕͋Δ ▶ ܭࢉෳࡶੑཧ͚ͩͰͳ͘ɺ ͞·͟·ͳͰग़ݱ 0-1 φοϓαοΫ ֤ wi , hi ͕༩͑ΒΕͨ G = {1, 2, ..., N} ʹ͍ͭ ͯɺ max ∑ i∈G′ wi s.t. ∑ i∈G′ hi ≤ H ͱͳΔ G′ ⊂ G 3 / 20