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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#405444 | #7901. Basic Substring Structure | Rikku_eq | WA | 27ms | 21524kb | C++14 | 3.8kb | 2024-05-05 22:19:53 | 2024-05-05 22:19:55 |
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];
// cout<<id<<" "<<s[len[id]+1]<<" "<<lcp(1, id)<<endl;
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 || id==i) { continue; }
upd(i, (__int128)(s[id+len[id]]-s[i])*pwBS[i-1] %mod );
rec[s[id+len[id]]]+=lcp(1, id)-len[id];
// cout<<id<<" "<<s[id+len[id]]<<" "<<lcp(1, id)<<endl;
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);
// cout<<res<<" "<<mxRec<<" "<<psum-pcnt*(i-1)<<endl;
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: 20992kb
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: 27ms
memory: 21524kb
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:
94 128 347 3 211 9 265 363 279 15 95 114 58 348 225 3 335 364 377 316 3 19 123 66 15 83 36 258 11 63 28 90 85 103 252 190 21 48 303 63 102 20 24 68 316 376 266 309 346 281 326 281 231 312 3 330 54 328 3 69 32 147 322 39 338 90 242 3 165 346 245 20 155 3 404 393 390 81 269 360 20 54 21 279 3 17 351 3...
result:
wrong answer 9th lines differ - expected: '278', found: '279'