10497477

#include <iostream>
#include <istream>
#include <ostream>
#include <string>

using namespace std;

int main()
{
	ios_base::sync_with_stdio(0); cin.tie(NULL);

	// mainString --- maStr
	string maStr;
	cin >> maStr;

	int m;
	cin >> m;

	int size = maStr.size();
	while(m--)
	{
		int ai;
		cin >> ai;

		// subsetOfMainString --- subMaStt
		string subMaStr;

		for (int i = ai - 1; i <= size - ai; ++i)
			subMaStr[(size - ai - i)] = maStr[i];

		for (int i = ai - 1; i <= size - ai; ++i)
			maStr[i] = subMaStr[i - ai + 1];
	}
	cout << maStr << '\n';
}

The above code is working fine and even able to pass the test in my pc but still why isn't it working here. Help !