Online IDE vs submission time

general
1

When I am running my code in CodeChef’s online IDE, the output I am getting for each test case is correct but while submitting the code I am getting “wrong answer” message. Can anyone help me out plz?

2

Its because there are other cases where your code might fail

For example if question is to print square of input and test cases are

2

OUTPUT: 4

5

OUTPUT: 25

Even this code passes your sample test case

void solve(){
 int n;
 cin >> n;
 if(n == 2)cout << 4 << endl;
 if(n == 5) cout << 25 << endl;
}

But this code is not right to pass all the test cases.

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