scy视频

#include <bits/stdc++.h>
using namespace std;
struct node
{
    int a[511], len;
    node()
    {
        len=1;
        memset(a, 0, sizeof(a));
    }
};
node operator*(node n1, int x)
{
    node no;
    no.len = n1.len;
    
    for(int i=1; i<=no.len; i++) no.a[i] = n1.a[i] * x;
    
    for(int i=1; i<=no.len; i++)
    {
        no.a[i+1] += no.a[i] / 10;
        no.a[i] %= 10;
    }
    
    int i = no.len;
    while(no.a[i+1] > 0)
    {
        i++;
        no.a[i+1] += no.a[i] / 10;
        no.a[i] %= 10;
    }
    while((no.a[i] == 0) && (i > 1)) i--;
    no.len = i;
    
    return no;
}
int main()
{
    int n; scanf("%d", &n);
    
    node ans; ans.len = 1; ans.a[1] = 1;
    
    for(int i=1; i<=n; i++)
    {
        int x; scanf("%d", &x);
        ans = ans * x;
    }
    
    for(int i=ans.len; i>=1; i--) printf("%d", ans.a[i]);
    printf("\n");
    
    return 0;
}