前言

呆学校呆3天依旧不想复习期中，感觉要凉。

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成绩

$Rank$	$Person$	$Score$	$A$	$B$	$C$
$1$	$2017myself$	$180$	$100$	$80$	$0$
$2$	$2014yqf$	$140$	$0$	$40$	$100$
$4$	$2017lw$	$80$	$0$	$80$	$0$
$4$	$2017hzb$	$80$	$0$	$80$	$0$
$4$	$2014lxf$	$80$	$0$	$80$	$0$
$4$	$2017lrz$	$80$	$0$	$80$	$0$
$7$	$2014lyj$	$70$	$40$	$30$	$0$
$8$	$2014lx$	$60$	$0$	$60$	$0$
$9$	$2017zyc$	$40$	$0$	$0$	$40$
$9$	$2015gjh$	$40$	$0$	$0$	$40$
$9$	$2017hjq$	$40$	$0$	$0$	$40$

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正题

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$T1:nssl1257-A$【数论】

博客链接:
https://blog.csdn.net/Mr_wuyongcong/article/details/83613856

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$T2:nssl1258-naive$的瓶子【贪心】

博客链接:
https://blog.csdn.net/Mr_wuyongcong/article/details/83614270

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$T3:nssl1259-sequence$【组合数$,$差分】

博客链接:
https://blog.csdn.net/Mr_wuyongcong/article/details/83614562

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$someofcode$

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T2 80分code

#include<cstdio>
#include<algorithm>
#define ll long long
using namespace std;
ll t,n,a[310],ans,s;
int main()
{scanf("%lld",&t);for(ll i=1;i<=t;i++){scanf("%lld",&n);ans=1e18;for(ll i=1;i<=n;i++)scanf("%lld",&a[i]);for(ll i=1;i<=n;i++){s=0;for(ll j=1;j<=n;j++)if(a[j]!=a[i])s+=a[j]*a[i];ans=min(ans,s);}printf("%lld\n",ans);}
}

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尾声

题目依旧ABC。