#include<iostream> #include<cstring> using namespace std; int main(){ char a1[5001],b1[5001]; int a[5001],b[5001],c[5001],lena,lenb,lenc,i,j,x; memset(a,0,sizeof(a)); memset(b,0,sizeof(b)); memset(c,0,sizeof(c)); scanf("%s",a1); scanf("%s",b1); lena=strlen(a1);lenb=strlen(b1); for(i=0;i<=lena-1;i++)a[lena-i]=a1[i]-48; for(i=0;i<=lenb-1;i++)b[lenb-i]=b1[i]-48; for(i=1;i<=lena;i++) { x=0; for(j=1;j<=lenb;j++) { c[i+j-1]=a[i]*b[j]+x+c[i+j-1]; x=c[i+j-1]/10; c[i+j-1]%=10; } c[i+lenb]=x; } lenc=lena+lenb; while(c[lenc]==0&&lenc>1)lenc--; for(i=lenc;i>=1;i--)cout<<c[i]; cout<<endl; }