I a new c++ programmer, and i started to solve the SPOJ online challenges just practising , and because of my few experiance.. it gives me wrong answers alwayes.

See the Challenge here.

My Code :

``````#include<iostream>
#include <vector>
using namespace std;

int reverse(int input)
{
int last_digit;
int reversedNum = 0;
while (input != 0) {
last_digit = input % 10;
reversedNum = reversedNum * 10 + last_digit;
input = input / 10;
}
return reversedNum;
}

bool check(int input)
{
if (reverse(input) == input) {
return false;
}
else
{
return true;
}
}

int main()
{
vector<int> myvector;
int numberOfTestCases;
cin >> numberOfTestCases;
for (int i = 0; i < numberOfTestCases; i++) {
int num;
cin >> num;
myvector.push_back(num);
}
for (vector<int>::iterator it = myvector.begin() ; it != myvector.end(); ++it)
{

int num = *it;
if (num > 1000000) {
cout << "number must less than 1000000" << endl;
}
else
{
do {
num++;
} while (check(num));
cout << num << endl;
}
}return 0;
}
``````

in program execution:
input `2` for no. of test cases
input `808` the 1st test case
input `2133` the 2nd test case
the output
818
2222

but it gives me that is a wrong answer, and i can't determine why, or what i missed from requiremnets,
can any one help.. Thanks.

## All 2 Replies

Check it out. For some numbers like 101,`reverse(110)` returns 11. So your reverse function isn't completely correct.

what i missed from requiremnets

Something you certainly missed, the requirements seem to state that:
... For a given positive integer K of not more than 1000000 digits ...

Also, in general, you are not supposed to output anything which is not mentioned in the requirements (I'm referring to the line #45 (cout << "number must less ... )).

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