高精度咋写，蒟蒻求助，c++

AIMEE11 @ 2022-08-04 19:01:48

#include<iostream>
using namespace std;
int main()
{
    unsigned long long n,sum=0,a=1;
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        a*=i;
        sum+=a;
    }
    cout<<sum;
}

by _cyle_King @ 2022-08-04 19:20:29

@AIMEE11 建议自学一下运算符重载以及类的构造函数再来看楼上的代码。

by AIMEE11 @ 2022-08-04 19:27:11

@_cyle_King 好的，谢谢

by CSPJ10pts @ 2022-08-04 19:42:17

出门右转题解区

by space_sea @ 2022-08-12 20:04:25

你既然是蒟蒻，那还做这题？？？癞蛤蟆想吃天鹅肉啊，还发求助，照你这说我都可以做出NOI了

by System32 @ 2022-08-19 16:20:30

啊这。。。

c++不会用高精度还是用python去吧，永远不会越界

实在不行就打表吧。

by System32 @ 2022-08-19 16:22:30

#include <iostream>
using namespace std;
string a[60] = {"0", "1", "3", "9", "33", "153", "873", "5913", "46233", "409113", "4037913", "43954713", "522956313", "6749977113", "93928268313", "1401602636313", "22324392524313", "378011820620313","6780385526348313", "128425485935180313", "2561327494111820313", "53652269665821260313", "1177652997443428940313", "27029669736328405580313", "647478071469567844940313", "16158688114800553828940313", "419450149241406189412940313", "11308319599659758350180940313", "316196664211373618851684940313", "9157958657951075573395300940313", "274410818470142134209703780940313", "8497249472648064951935266660940313", "271628086406341595119153278820940313", "8954945705218228090637347680100940313", "304187744744822368938255957323620940313", "10637335711130967298604907294846820940313", "382630662501032184766604355445682020940313", "14146383753727377231082583937026584420940313", "537169001220328488991089808037100875620940313", "20935051082417771847631371547939998232420940313", "836850334330315506193242641144055892504420940313", "34289376947494122614363304694584807557656420940313", "1439295494700374021157505910939096377494040420940313", "61854558558074209658512637979453093884758552420940313", "2720126133346522977702138448994068984204397080420940313", "122342346998826717539665299944651784048588130840420940313", "5624964506810915667389970728744906677010239883800420940313", "264248206017979096310354325882356886646207872272920420940313", "12678163798554051767172643373255731925167694226950680420940313", "620960027832821612639424806694551108812720525606160920420940313", "31035053229546199656252032972759319953190362094566672920420940313"};
int main()
{
    int n;
    cin >> n;
    cout << a[n];
    return 0;
}

这是打表的代码。