PY
py
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n=int(input())
m=[]
for i in range(n):
l1=[]
for j in range(n):
l1.append(0)
m.append(l1)
#n=int(input())
#m=[[col for col in list(map(int,input().split()))] for r in range(n)]
for i in range(n):
l1=[int(k) for k in input().split(" ")]
for j in range(n):
m[i][j]=l1[j]
for i in range(n):
for j in range(n):
if j<i:
m[i][j]=0
for i in range(n):
for j in range(n):
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OUTPUT
Run