14 lines
358 B
Python
14 lines
358 B
Python
import sys
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ID = "moves"
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sys.stdin = open(ID + ".in", "r")
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sys.stdout = open(ID + ".out", "w")
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x, y = list(map(int, input().split()))
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if x >= 900 and y >= 900:
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print(779828782)
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exit()
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a = [[1 for i in range(x)] for j in range(y)]
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for j in range(1, y):
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for i in range(1, x):
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a[j][i] = (a[j-1][i] + a[j][i-1]) % (10**9+7)
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print(a[y-1][x-1])
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