- #include <iostream> 
- using namespace std; 
-   
- int main() { 
- 	int n, m, k = 1; 
- 	cin >> n >> m; 
- 	if ( n >= m) { 
- 		cout << 0; 
- 	} 
- 	else { 
- 		for ( int i = 2; i <= n; i++ ) { 
- 			k = ( k * i ) % m; 
- 		} 
- 		cout << k;  
- 	} 
- 	return 0;  
- } 
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