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15 lines
352 B
C++

#define _CRT_SECURE_NO_WARNINGS
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
#include <bits/stdc++.h>
using namespace std;
const int mod = 1e6 + 3;
int main()
{
for (int n; ~scanf("%d", &n);)
{
long long f = 1;
for (int i = 1; i <= n; i++) f = f * i % mod;
printf("%lld\n", f);
}
return 0;
}