alien ' sorgantimelimit :2 secondsmemorylimit :6536 kb there ' sanalienwhosenameis的重要招牌. itisanuniversalsoldercamefromplanemefromplaneitis
inputthefirstlinecontainsasingleintegert (0t10000 ),indicatingtherearetcasesintotal.thenthefollowingtlineseseachcontacontatal
Output For each case,outputthepossibilitydescribedinproblemstatement,rounded to 3 decimal points。
sample input 35.00085.00024.910 sample output0. 1910.9320.132 author : fan,殷勤钥匙/strong
Contest: The 13th Zhejiang University Programming rydl/strong
//泊松定理# include iostream # include cstdio # include cstring # include algorithm # include stack # include map # includeset # includest double e=2.7182818285; double E,sum; int main ()//printf ) ' %.10lf ',exp ); while((Scanf ) ' %d ',t ) ) ) for ); t0; t--}{scanf('%d%lf ',n,e ); sum=pow(e,-E ); 双精度b=1.0,b=1.0; for(intI=1; i=n; I ) { a=a*E; b=b*i; sum=suma/b*pow(e,-E ); //sum=sum*pow(e,-E ); //最后一起乘坐会出现精度问题,数值为printf('%.3lfn ',sum ); } } return 0; () ) ) ) )。