- #include <iostream> 
- #include <math.h> 
- using namespace std; 
-   
- int main() { 
- 	double x,n,s=0; 
- 	cin>>n>>x; 
- 	for (int i=0; i<n; i++){ 
- 		s+=(x=sin(x)); 
- 	} 
- 	cout<<"S="<<s; 
- } 
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