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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#846062 | #9482. Count Pseudo-Palindromes | ucup-team3555 | WA | 1335ms | 168216kb | C++20 | 1.5kb | 2025-01-06 21:32:49 | 2025-01-06 21:32:49 |
Judging History
answer
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
#define ull unsigned long long
#define fi first
#define se second
#define ll long long
#define pb push_back
mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count());
const int N=1e6+5;
int n,a[N],hs[N],pre[N],suf[N],c[N];
cc_hash_table<ull,int> mp;
ull s=0;
set<pair<int,int> > S[N];
vector<int> V;
void solve(int op=0){
for(int i=1;i<=n;i++) c[i]=0;
s=0,mp.clear(),mp[0]=0,V.clear();
for(int r=1,i=0,l=0;r<=n;r++){
++c[a[r]];
if(c[a[r]]==1) V.pb(r);
s^=hs[a[r]];
while(V.size()&&c[a[V.back()]]==2) V.pop_back();
if(V.size()){
i=V.back();
if(mp.find(s^hs[a[i]])!=mp.end()){
l=mp[s^hs[a[i]]]+1;
if(!op) S[i].insert({l,r});
else S[n-i+1].insert({n-r+1,n-l+1});
}
}
mp[s]=r;
}
}
int main(){
ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
cin>>n;
for(int i=1;i<=(n<<1);i++) cin>>a[i];
for(int i=1;i<=n;i++) hs[i]=rd();
n<<=1;
s=0,mp.clear(),pre[0]=++mp[0];
for(int i=1;i<=n;i++) s^=hs[a[i]],pre[i]=++mp[s];
s=0,mp.clear(),suf[n+1]=++mp[0];
for(int i=n;i>=1;i--) s^=hs[a[i]],suf[i]=++mp[s];
solve(),reverse(a+1,a+n+1),solve(1);
for(int i=1;i<=n;i++){
ll res=0;
for(auto j:S[i]) res+=1ll*pre[j.fi-1]*suf[j.se+1];
cout<<res<<" \n"[i==n];
}
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 4ms
memory: 58796kb
input:
2 1 1 2 2
output:
1 2 2 1
result:
ok 4 tokens
Test #2:
score: 0
Accepted
time: 4ms
memory: 59756kb
input:
3 2 1 2 3 1 3
output:
1 2 2 2 2 1
result:
ok 6 tokens
Test #3:
score: 0
Accepted
time: 8ms
memory: 60188kb
input:
4 1 2 4 3 4 1 3 2
output:
1 2 1 2 1 3 1 1
result:
ok 8 tokens
Test #4:
score: 0
Accepted
time: 4ms
memory: 60744kb
input:
1 1 1
output:
1 1
result:
ok 2 tokens
Test #5:
score: -100
Wrong Answer
time: 1335ms
memory: 168216kb
input:
500000 233733 151347 468353 495903 234861 297169 312993 2734 287872 359375 79017 285205 219439 37290 409190 194953 306816 472906 123794 121028 66509 62235 385879 300188 485875 72413 167304 333428 33910 220100 151575 22575 206653 82054 111518 34032 48702 198940 6262 222529 170641 1735 38943 235003 11...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...
result:
wrong answer 1356th words differ - expected: '1', found: '2'