پیام#include <bits/stdc++.h>

#include <bits/stdc++.h> using namespace std; double f1(double m, double k){ if(fabs(k+1)>(m-2)){ return sin(k+3-m);} else if(fabs(k+1)<=(m-2)){ return cos(k+3-m);} int main () double m, k, p; cin>>m>>k; p=f1(m, k); cout<<p; return 0; } /stdin 1 2