import sys n, pp, qq = map(int, sys.stdin.readline().split()) a = list(map(int, sys.stdin.readline().split())) dp = [[[0] * 1000 for _ in range(1000)] for _ in range(2)] def e(p, q, l, r, sum_of_a): global pp, qq, dp, a if l == r: return a[l] if pp == q: if dp[0][l + 1][r] == 0: dp[0][l + 1][r] = e(...