1086 就不告诉你

int s_len(char s[]){ 
    int len = 0;
    while(s[len]) len++;
    return len;
}
int main()
{
    //freopen("D:\\文件夹\\Desktop\\use.txt","r",stdin);
    int A,B;scanf("%d %d",&A,&B);getchar();
    int C = A*B;char s[1000000];int tag = 0;//去掉输出开头的0
    sprintf(s,"%d",C);
    for(int i = s_len(s)-1;i >=0;--i){
        if(s[i] == '0' && tag == 0) continue;
        else tag = 1;

        if(tag == 1) printf("%c",s[i]);
    }

    return 0;
}