完全背包 - FaceYe



完全背包 - FaceYe

直接说题意,完全背包定义有N种物品和一个容量为V的背包,每种物品都有无限件可用。第i种物品的体积是c,价值是w。求解将哪些物品装入背包可使这些物品的体积总和不超过背包容量,且价值总和最大。本题要求是背包恰好装满背包时,求出最大价值总和是多少。如果不能恰好装满背包,输出NO

输入
第一行: N 表示有多少组测试数据(N<7)。
接下来每组测试数据的第一行有两个整数M,V。 M表示物品种类的数目,V表示背包的总容量。(0<M<=2000,0<V<=50000)
接下来的M行每行有两个整数c,w分别表示每种物品的重量和价值(0<c<100000,0<w<100000)
输出
对应每组测试数据输出结果(如果能恰好装满背包,输出装满背包时背包内物品的最大价值总和。 如果不能恰好装满背包,输出NO)

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