#include <bits/stdc++.h>
using namespace std;
int main()
{
    char a1[101]={0},b1[101]={0};
    int a[101]={0},b[101]={0},c[201]={0};
    int lena=0,lenb=0,lenc=0,i=0,j=0,x=0,f=1;
    cin>>a1>>b1;
    if(a1[0]=='-')
    {
        f=-f;
        strcpy(a1,&a1[1]);
    }
    if(b1[0]=='-')
    {
        f=-f;
        strcpy(b1,&b1[1]);
    }

    lena=strlen(a1);
    lenb=strlen(b1);
    for(i=0;i<lena;i++) a[lena-i-1]=a1[i]-'0';
    for(i=0;i<lenb;i++) b[lenb-i-1]=b1[i]-'0';
    for (i=0;i<lena;i++)
    {
        x=0;
        for(j=0;j<lenb;j++)
        {
            c[i+j]=a[i]*b[j]+x+c[i+j];
            x=c[i+j]/10;
            c[i+j]%=10;
        }
        c[i+lenb]=x;
    }
    lenc=lena+lenb;
    while (c[lenc]==0&&lenc>0)
        lenc--;
    if(f==-1 && c[lenc]>0) cout<<'-';
    for(i=lenc;i>=0;i--) cout<<c[i];
    return 0;
}

1 comments

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    • 1

    Information

    ID
    1036
    Time
    1000ms
    Memory
    256MiB
    Difficulty
    8
    Tags
    # Submissions
    46
    Accepted
    6
    Uploaded By