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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#353331#8050. Random Permutationucup-team134WA 2923ms7296kbC++171.2kb2024-03-14 02:44:402024-03-14 02:44:42

Judging History

你现在查看的是最新测评结果

  • [2024-03-14 02:44:42]
  • 评测
  • 测评结果:WA
  • 用时:2923ms
  • 内存:7296kb
  • [2024-03-14 02:44:40]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define ll long long

const int N=300050;
const int S=100;
const int C=1500;

int p[N],tmp[N],pos[N];
int bal[N],cnt[2*N];

const int M=2*N;
int ls[M],rs[M],tsz,root,sz[M];
void Add(int&c,int ss,int se,int qi,int f){
	if(!c)c=++tsz;
	sz[c]+=f;
	if(ss==se)return;
	int mid=ss+se>>1;
	if(qi<=mid)Add(ls[c],ss,mid,qi,f);
	else Add(rs[c],mid+1,se,qi,f);
}
int Get(int c,int ss,int se,int k){
	if(ss==se)return ss;
	int mid=ss+se>>1;
	if(sz[ls[c]]<k)return Get(rs[c],mid+1,se,k-sz[ls[c]]);
	return Get(ls[c],ss,mid,k);
}
int main(){
	int n;
	scanf("%i",&n);
	for(int i=1;i<=n;i++){
		scanf("%i",&p[i]);
		pos[p[i]]=i;
	}
	ll ans=0;
	for(int j=1;j<S;j++){
		for(int i=1;i<=n+j;i++){
			if(i-j>=1)Add(root,1,n,p[i-j],-1);
			if(i<=n)Add(root,1,n,p[i],1);
			if(i>=j && i<=n){
				ans+=Get(root,1,n,(j+1)/2);
			}
		}
	}
	for(int mid=n/2-C;mid<=n/2+C;mid++){
		if(mid>=1 && mid<=n){
			for(int i=1;i<=n;i++){
				bal[i]=bal[i-1]+(p[i]>mid)-(p[i]<mid);
				if(i-S>=0 && i-S<pos[mid])cnt[N+bal[i-S]]++;
				if(i>=pos[mid]){
					ans+=(ll)(cnt[N+bal[i]]+cnt[N+bal[i]-1])*mid;
				}
			}
			for(int i=0;i<=n;i++)cnt[N+bal[i]]=0;
		}
	}
	printf("%lld\n",ans);
	return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 1ms
memory: 3820kb

input:

4
1 4 2 3

output:

22

result:

ok 1 number(s): "22"

Test #2:

score: -100
Wrong Answer
time: 2923ms
memory: 7296kb

input:

100000
56449 21738 74917 44834 36187 96576 37204 28451 3444 13029 66039 8955 51445 30706 27229 37159 66052 16691 70389 29935 44984 3648 75082 73600 76621 28345 5298 37940 49412 85260 92029 18185 84398 10233 79227 98312 96649 30680 65206 38879 75397 26951 11294 58085 37297 97167 59252 44104 4058 3796...

output:

244798194512245

result:

wrong answer 1st numbers differ - expected: '250202478701074', found: '244798194512245'