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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#405436 | #7901. Basic Substring Structure | Rikku_eq | WA | 29ms | 14816kb | C++14 | 3.6kb | 2024-05-05 21:52:24 | 2024-05-05 21:52:25 |
Judging History
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;
}
Details
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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'