/******************************************************************************
Online C++ Compiler.
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*******************************************************************************/
#include <iostream>
using namespace std;
int main()
{
char c;
do
{
printf("Podaj rodzaj modyfikacji: ");
scanf(" %c", &c);
c = tolower(c);
if (c == 's' || c == 'c')
{
printf("OK");
break;
}
else
{
printf("Incorrect input\n");
continue;
}
}
while (true);
return 0;
}