Hello chefs, will you please explain me why the 1st one is correct why not 2nd and 3rd for the problem : WATCHFB Problem - CodeChef?
1st solution
for _ in range(int(input())):
n = int(input())
p,pa,pb,f = 2,0,0,0
for _ in range(n):
m,a,b = map(int,input().split())
if a==b or m==1:
print('YES')
pa,pb = a,b
f = 1
elif m==2:
if f==0:
print('NO')
elif min(a,b) < max(pa,pb):
print('YES')
pa,pb = a,b
else:
print('NO')
2nd solution
for _ in range(int(input())):
n = int(input())
p,pa,pb,f = 2,0,0,0
for _ in range(n):
m,a,b = map(int,input().split())
if a==b or m==1:
print('YES')
p,pa,pb = m,a,b
f = 1
elif p==2:
if f==0:
print('NO')
elif a < max(pa,pb) or b<max(pa,pb):
print('YES')
else:
print('NO')
p,pa,pb = m,a,b
3rd solution
for _ in range(int(input())):
n = int(input())
p,pa,pb = 2,0,0
for _ in range(n):
m,a,b = map(int,input().split())
if m == 1 or a==b:
print('YES')
p,pa,pb = m,a,b
else:
if pa==pb:
print('NO')
elif min(a,b) < max(pa,pb):
print('YES')
else:
print('NO')
p,pa,pb = m,a,b
