#include <iostream>
#include <cstring>
using namespace std;
int strToNumber(char *s) {
int x = 0, i = 0;
while (i < strlen(s)){
x = x * 10 + int(s[i] % 10 - '0');
++i;
}
return (x * x);
}
int main() {
char c[1001];
cin.getline(c, 1001);
cout << strToNumber(c);
return 0;
}
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