#define MD 998244353 Mint d[11][11],e[][]; d[0][0]=1; ll@x,@k; Mint p=Mint(x)/100; rep(2k){ rep(y,11){ rep(x,11){ e[y][x]=d[y][x]; d[y][x]=0; } } rep(y,11){ rep(x,y,11){ if(y>0){ d[y-1][x]+=e[y][x]*(1-p); } if(y<10){ d[y+1][x+(x==y)]+=e[y][x]*p; } } } } Mint z; rep(x,0,11){ z+=d[0][x]*x; } wt(z);