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#define _CRT_SECURE_NO_WARNINGS
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#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
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#include <bits/stdc++.h>
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using namespace std;
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int main()
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{
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long long n;
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scanf("%lld", &n);
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printf("%lld", n * n);
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return 0;
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}
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