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#405436#7901. Basic Substring StructureRikku_eqWA 29ms14816kbC++143.6kb2024-05-05 21:52:242024-05-05 21:52:25

Judging History

你现在查看的是最新测评结果

  • [2024-05-05 21:52:25]
  • 评测
  • 测评结果:WA
  • 用时:29ms
  • 内存:14816kb
  • [2024-05-05 21:52:24]
  • 提交

answer

#include <bits/stdc++.h>
#define N 200005
#define mod 1000000007998244353
#define Base 1000000009
// #define __int128 ll
using namespace std;
typedef long long ll;

int T;
int s[N+1];
int n, len[N];
ll tgsum[N], tgcnt[N], rec[N];
vector <int> vec0[N], vec1[N];

ll bit[N], pwBS[N];

inline void addmod (ll &a, ll b) { (a+=b)%=mod; }

void upd (int x, ll num) { while (x<=n) { addmod(bit[x], num); x+=(x&(-x)); } }
ll qry (int x) { ll res=0; while (x) { addmod(res, bit[x]); x-=(x&(-x)); } return res; }

int lcp (int i, int j)
{
    if (i>j) { swap(i, j); }
    int l=0, r=n-j+1, res=0;
    ll qi=qry(i-1), qj=qry(j-1);
    while (l<=r) {
        int md=(l+r)/2;
        ll res1=(__int128)(qry(i+md-1)-qi)*pwBS[j-i]%mod;
        ll res2=(qry(j+md-1)-qj);

        res1=(res1+mod)%mod;
        res2=(res2+mod)%mod;
        if (res1==res2) { res=md; l=md+1; }
        else { r=md-1; }
    }
    return res;
}

void add (int l, int r, ll num)
{
    tgsum[l]+=num; tgsum[r+1]-=num;
    tgcnt[l]++; tgcnt[r+1]--;
}

void clr ()
{
    for (int i=1; i<=n*2+3; i++) { tgsum[i]=0; tgcnt[i]=0; }
    for (int i=1; i<=n*2+3; i++) { bit[i]=0; }
    for (int i=1; i<=n*2+3; i++) { len[i]=0; }
    for (int i=1; i<=n*2+3; i++) { vec0[i].clear(); vec1[i].clear(); rec[i]=0; s[i]=0; }
}

void solve ()
{
    scanf("%d", &n);
    for (int i=1; i<=n; i++) { scanf("%d", &s[i]); }

    s[n+1]=0;
    // for (int i=1; i<=n; i++) { s[i]=rand()%2+1; }

    for (int i=1; i<=n; i++) { upd(i, (__int128)s[i]*pwBS[i-1]%mod); }
    for (int i=1; i<=n; i++) { len[i]=lcp(1, i); }

    ll res=0;
    for (int i=1; i<=n; i++) { vec0[i+len[i]].push_back(i); vec1[len[i]+1].push_back(i); res+=len[i]; }

    for (int i=2; i<=n; i++) {
        int lpre=1, rpre=len[i];
        int lsuf=i, rsuf=i+len[i]-1;
        rpre=min(rpre, lsuf-1);
        add(lpre, rpre, len[i]);
        add(lsuf, rsuf, i+len[i]-1);
    }

    ll prt=0, psum=0, pcnt=0;

    for (int i=1; i<=n; i++) {
        psum+=tgsum[i]; pcnt+=tgcnt[i];

        ll mxRec=0;

        int org=s[i];

        for (int j=0; j<(int)vec0[i].size(); j++) {
            int id=vec0[i][j];

            if (s[len[id]+1]==org) { continue; }

            upd(i, (__int128)(s[len[id]+1]-s[i])*pwBS[i-1] %mod );
            rec[s[len[id]+1]]+=lcp(1, id)-len[id];
            mxRec=max(mxRec, rec[s[len[id]+1]]);
            
            s[i]=s[len[id]+1];
        }
        for (int j=0; j<(int)vec1[i].size(); j++) {
            int id=vec1[i][j];

            if (s[id+len[id]]==org) { continue; }

            upd(i, (__int128)(s[id+len[id]]-s[i])*pwBS[i-1] %mod );
            rec[s[id+len[id]]]+=lcp(1, id)-len[id];
            mxRec=max(mxRec, rec[s[id+len[id]]]);

            s[i]=s[id+len[id]];
        }

        ll ans=res+mxRec-(psum-pcnt*(i-1));
        // cout<<ans<<endl;
        prt+=(ans^i);

        upd(i, (__int128)(org-s[i])*pwBS[i-1] %mod );
        s[i]=org;

        for (int j=0; j<(int)vec0[i].size(); j++) {
            int id=vec0[i][j];
            if (s[len[id]+1]==org) { continue; }
            rec[s[len[id]+1]]=0;
        }
        for (int j=0; j<(int)vec1[i].size(); j++) {
            int id=vec1[i][j];
            if (s[id+len[id]]==org) { continue; }
            rec[s[id+len[id]]]=0;
        }
    }

    printf("%lld\n", prt);

    clr();
}

int main ()
{
    // freopen("0test.in", "r", stdin);
    // freopen("0test.out", "w", stdout);

    pwBS[0]=1; for (int i=1; i<=200000; i++) { pwBS[i]=(__int128)pwBS[i-1]*Base%mod; }

    scanf("%d", &T);
    while (T--) { solve(); }

    return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 6ms
memory: 14816kb

input:

2
4
2 1 1 2
12
1 1 4 5 1 4 1 9 1 9 8 10

output:

15
217

result:

ok 2 lines

Test #2:

score: -100
Wrong Answer
time: 29ms
memory: 14704kb

input:

10000
8
2 1 2 1 1 1 2 2
9
2 2 1 2 1 2 1 2 1
15
2 1 2 1 1 1 1 2 2 1 2 1 2 2 1
2
1 1
10
2 1 1 1 2 2 1 1 2 2
3
2 1 2
11
1 2 2 1 1 2 1 2 2 1 1
14
2 1 1 1 1 2 1 1 1 2 2 1 2 1
12
2 2 2 1 2 2 2 1 1 2 1 2
4
2 1 1 2
8
1 2 2 2 1 2 1 1
8
1 1 2 1 2 1 1 1
6
2 1 1 1 2 2
14
2 2 1 1 1 1 2 2 2 1 2 2 1 1
10
1 2 2 1 1...

output:

94
127
347
3
211
9
265
363
279
15
95
113
58
351
225
3
334
357
376
316
3
19
123
66
15
83
36
258
11
63
28
85
84
103
252
189
21
48
303
63
102
20
24
67
311
376
266
309
348
281
326
281
231
312
3
330
54
328
3
69
32
147
322
39
338
90
241
3
164
346
251
20
155
3
404
393
390
81
269
359
20
54
21
279
3
17
351
3...

result:

wrong answer 2nd lines differ - expected: '128', found: '127'