Reduce to One Problem Code: REDONE

Why i am getting wrong answer for this code
try:
def change(arrr):
for i in range(len(arrr)-1):
val = ((arrr[0]*arrr[1])%(109+7) + arrr[0] + arrr[1])%(109+7)
arrr.append(val)
del arrr[0:2]
print(val)

time = int(input())
while time>0:
    arr = []
    size = int(input())
    for j in range(size):
        val = j+1
        arr.append(val)
    change(arr)
    time-=1

except:
pass
In my local editor it is giving proper solution.

Please format your code using the “</>” “Preformatted text” - this is unrunnable :slight_smile:

try:
    def change(arrr):
        for i in range(len(arrr)-1):
            val = ((arrr[0]*arrr[1])%(10**9+7) + arrr[0] + arrr[1])%(10**9+7)
            arrr.append(val)
            del arrr[0:2]
        print(val)
          

    time = int(input())
    while time>0:
        arr = []
        size = int(input())
        for j in range(size):
            val = j+1
            arr.append(val)
        change(arr)
        time-=1
except:
    pass`Preformatted text`

Close enough (except for the literal Preformatted text that you appended on the end XD)

Your code throws an exception when run with the example testcase

3
1
2
4

but you catch and hide the exception.

Try e.g.

try:
    def change(arrr):
        for i in range(len(arrr)-1):
            val = ((arrr[0]*arrr[1])%(10**9+7) + arrr[0] + arrr[1])%(10**9+7)
            arrr.append(val)
            del arrr[0:2]
        print(val)
          

    time = int(input())
    while time>0:
        arr = []
        size = int(input())
        for j in range(size):
            val = j+1
            arr.append(val)
        change(arr)
        time-=1
except Exception as exc:
    print exc

    pass

to help you debug. Or just remove the try … except around the code.

thank you for helping me, but when i remove try except it gives Runtime error (NZEC).

Have you run it on your local machine with the given testcase? That should be your first step :slight_smile:

Thank you for pointing mistakes :+1:.

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