python版本来了，递归
import sys
n = sys.stdin.readline().strip()
m = []
line_num = 0
for line in sys.stdin.readlines():
#temp = sys.stdin.readline().strip().split(' ')
temp = line.strip().split(' ')
m.append(temp)
dp = m
if n < 2:
print(int(dp[0][0]))
else:
for i in range(int(n)-2,-1,-1):
for j in range(i,-1,-1):
dp[i][j] = max(int(dp[i+1][j]),int(dp[i+1][j+1])) + int(dp[i][j])
print(int(dp[0][0])) 唉，检查半天readline出错，用不惯啊用不惯
，校友加油
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