Help me Why is this Wrong

https://www.codechef.com/viewsolution/15336111

You are executing 1 iteration less than required.

The reason is that, suppose input as-

4
65
566
11
1623455078

It can be represented as-

4\n
65\n
566\n
11\n
1623455078\n

The newline character after 4 gets caught by your string and is used in first iteration of T, giving a blank new line. This also leads to last string not getting executed. Hence, WA.

Try taking that newline char by using scanf("%d%c",&T,&ch);

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