Статья Автор: Силаева Арина

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n, m = map(int, input().split())
a = [list(map(int, input().split())) for i in range(n)]
dp = [[0] * m for i in range(n)]
dp[n-1][m-1] = a[n-1][m-1]

for i in range(n-2, -1, -1):
    dp[i][m-1] = dp[i+1][m-1] + a[i][m-1]

for i in range(m-2, -1, -1):
    dp[n-1][i] = dp[n-1][i+1] + a[n-1][i]

for i in range(n-2, -1, -1):
    for j in range(m-2, -1, -1):
        dp[i][j] = max(dp[i+1][j], dp[i][j+1]) + a[i][j]

print(dp[0][0])

n, m = map(int, input().split())
a = [list(map(int, input().split())) for i in range(n)]
dp = [[0] * m for i in range(n)]
dp[n-1][0] = a[n-1][0]

for i in range(n-2, -1, -1):
    dp[i][0] = dp[i+1][0] + a[i][0]

for i in range(1, m):
    dp[n-1][i] = dp[n-1][i-1] + a[n-1][i]

for i in range(n-2, -1, -1):
    for j in range(1, m):
        dp[i][j] = max(dp[i+1][j], dp[i][j-1]) + a[i][j]

print(dp[0][m-1])

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