{"trustable":true,"sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003eFarmer John wants to repair a small length of the fence around the pasture. He measures the fence and finds that he needs \u003ci\u003eN\u003c/i\u003e (1 ≤ \u003ci\u003eN\u003c/i\u003e ≤ 20,000) planks of wood, each having some integer length \u003ci\u003eL\u003csub\u003ei\u003c/sub\u003e\u003c/i\u003e (1 ≤ \u003ci\u003eL\u003csub\u003ei\u003c/sub\u003e\u003c/i\u003e ≤ 50,000) units. He then purchases a single long board just long enough to saw into the \u003ci\u003eN\u003c/i\u003e planks (i.e., whose length is the sum of the lengths \u003ci\u003eL\u003csub\u003ei\u003c/sub\u003e\u003c/i\u003e). FJ is ignoring the \"kerf\", the extra length lost to sawdust when a sawcut is made; you should ignore it, too.\u003c/p\u003e\u003cp\u003eFJ sadly realizes that he doesn\u0027t own a saw with which to cut the wood, so he mosies over to Farmer Don\u0027s Farm with this long board and politely asks if he may borrow a saw.\u003c/p\u003e\u003cp\u003eFarmer Don, a closet capitalist, doesn\u0027t lend FJ a saw but instead offers to charge Farmer John for each of the \u003ci\u003eN\u003c/i\u003e-1 cuts in the plank. The charge to cut a piece of wood is exactly equal to its length. Cutting a plank of length 21 costs 21 cents.\u003c/p\u003e\u003cp\u003eFarmer Don then lets Farmer John decide the order and locations to cut the plank. Help Farmer John determine the minimum amount of money he can spend to create the \u003ci\u003eN\u003c/i\u003e planks. FJ knows that he can cut the board in various different orders which will result in different charges since the resulting intermediate planks are of different lengths.\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"Line 1: One integer \u003ci\u003eN\u003c/i\u003e, the number of planks\r\u003cbr\u003eLines 2..\u003ci\u003eN\u003c/i\u003e+1: Each line contains a single integer describing the length of a needed plank"}},{"title":"Output","value":{"format":"HTML","content":"Line 1: One integer: the minimum amount of money he must spend to make \u003ci\u003eN\u003c/i\u003e-1 cuts"}},{"title":"Sample","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e3\r\n8\r\n5\r\n8\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e34\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Hint","value":{"format":"HTML","content":"He wants to cut a board of length 21 into pieces of lengths 8, 5, and 8.\r\u003cbr\u003eThe original board measures 8+5+8\u003d21. The first cut will cost 21, and should be used to cut the board into pieces measuring 13 and 8. The second cut will cost 13, and should be used to cut the 13 into 8 and 5. This would cost 21+13\u003d34. If the 21 was cut into 16 and 5 instead, the second cut would cost 16 for a total of 37 (which is more than 34)."}}]}