ll@f,a,@b,@c,y=0,g=b+c-f-1,s,S;rep(d,1,g)REP(e,1,g-d+1){a=d+f+e,s=a+b+c,S=s*(s-2a)*(s-2b)*(s-2c);(s=2a*(b*b*e-c*c*d))%(d*e)==0&&s/(d*e)==sqrt(4a*a*b*b-S)-sqrt(4a*a*c*c-S)?++y:y;}wt(y?"Yes":"No");