#include #include #include #include #include #include #include #include #include #include // #include #include #define int long long #define inf 1000000007 #define pa pair #define ll long long #define pal pair #define ppap pair #define ssa pair #define mp make_pair #define pb push_back #define EPS (1e-10) #define equals(a,b) (fabs((a)-(b)) (const pa3 &p) const{ if(x!=p.x) return x>p.x; if(y!=p.y) return y>p.y; return z>p.z; //return x != p.x ? x (const pa4 &p) const{ if(x!=p.x) return x>p.x; if(y!=p.y) return y>p.y; if(z!=p.z)return z>p.z; return w>p.w; //return x != p.x ? x (const pa2 &p) const{ return x != p.x ? x>p.x: y>p.y; } bool operator == (const pa2 &p) const{ return abs(x-p.x)==0 && abs(y-p.y)==0; } bool operator != (const pa2 &p) const{ return !(abs(x-p.x)==0 && abs(y-p.y)==0); } }; #define ppa pair class Point{ public: double x,y; Point(double x=0,double y=0):x(x),y(y) {} Point operator + (Point p) {return Point(x+p.x,y+p.y);} Point operator - (Point p) {return Point(x-p.x,y-p.y);} Point operator * (double a) {return Point(x*a,y*a);} Point operator / (double a) {return Point(x/a,y/a);} double absv() {return sqrt(norm());} double norm() {return x*x+y*y;} bool operator < (const Point &p) const{ return x != p.x ? x struct Segment{ Point p1,p2; }; double dot(Vector a,Vector b){ return a.x*b.x+a.y*b.y; } double cross(Vector a,Vector b){ return a.x*b.y-a.y*b.x; } bool parareru(Point a,Point b,Point c,Point d){ // if(abs(cross(a-b,d-c))b) return gcd(b,v); if(v==b) return b; if(b%v==0) return v; return gcd(v,b%v); } double distans(double x1,double y1,double x2,double y2){ double rr=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2); return sqrt(rr); } // int pr[2000010]; // int inv[2000010]; int beki(int wa,int rr,int warukazu){ if(rr==0) return 1%warukazu; if(rr==1) return wa%warukazu; if(rr%2==1) return (beki(wa,rr-1,warukazu)*wa)%warukazu; int zx=beki(wa,rr/2,warukazu); return (zx*zx)%warukazu; } /* int comb(int nn,int rr){ int r=pr[nn]*inv[rr]; r%=inf; r*=inv[nn-rr]; r%=inf; return r; } void gya(int ert){ pr[0]=1; for(int i=1;i,greater> pq; //sort(ve.begin(),ve.end(),greater()); //----------------kokomade tenpure------------ //vector ans(100000000),ans2(100000000); int t[110]; signed main(){ double n,m; cin>>n>>m; printf("%.10lf\n",n+m/3.0); return 0; }