源代码

// LUOGU_RID: 116328195
//#pragma GCC optimize(2)
#include<cstdio>
#include<vector>
#define lol long long
const int N=2e5+1;
const int mod=998244353;
lol Inv(lol x,int y=mod-2)
{
	lol ans = 1;
	while (y)
	{
		if (y & 1) ans = 1ll * ans * x % mod;
		x = 1ll * x * x % mod;
		y >>= 1;
	}
	return ans;
}
lowbit(int x){return x&-x;}
struct BIT
{
	std::vector<int>idx;
    void update(int i,int k)//单点修改
	{
		for(;i<=N;i+=lowbit(i))
		{
			idx[i]+=k%mod;
			idx[i]%=mod;
		}
	}
	int query(int i)
	{
		int ans1=0;
		for(;i>0;i-=lowbit(i))
			ans1=(ans1+idx[i])%mod;
		return ans1;
	}
	BIT()
	{
		idx.reserve(N+5);
	}
};
int main()
{
	BIT _cont/*小于某个权值的球的数量*/,_sum/*总和*/;
    int n;
	long long ans=0,sum2=0;
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    {
        int zzz;
        scanf("%d",&zzz);
        ans+=(((lol)_cont.query(zzz)*2ll+1ll)*(lol)zzz)%(lol)mod;
        ans%=(lol)mod;/*比它权值小或等于的数*//*只算一次自己*//*权值*/
		ans+=(sum2-(lol)_sum.query(zzz))*2ll%(lol)mod;
		ans%=(lol)mod;/*比它权值大的数的权值总和*/
		printf("%lld\n",(lol)ans*Inv((lol)i*(lol)i%(lol)mod)%(lol)mod);
		sum2=(zzz+sum2)%mod;
		_cont.update(zzz,1);
		_sum.update(zzz,zzz); 
    }
    return 0;
}

ATCoder上的错误

./Main.cpp:19:13: error: ISO C++ forbids declaration of ‘lowbit’ with no type [-fpermissive]
   19 | lowbit(int x){return x&-x;}
      |             ^
./Main.cpp: In function ‘int main()’:
./Main.cpp:48:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   48 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
./Main.cpp:52:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   52 |         scanf("%d",&zzz);
      |         ~~~~~^~~~~~~~~~~

本地 devc++ 返回的编译结果

编译结果...
--------
- 错误: 0
- 警告: 0
- 输出文件名: C:\Users\Administrator\Documents\ABC276F.exe
- 输出大小: 1.61208152770996 MiB
- 编译时间: 0.52s