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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#315596 | #7901. Basic Substring Structure | lmeowdn | WA | 8ms | 18860kb | C++14 | 3.2kb | 2024-01-27 14:36:39 | 2024-01-27 14:36:40 |
Judging History
answer
//vanitas vanitatum et omnia vanitas
#include <bits/stdc++.h>
#define fi first
#define se second
#define eb emplace_back
#define mp make_pair
using namespace std;
typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef __int128 i128;
template<typename T,typename U>
T ceil(T x, U y) {return (x>0?(x+y-1)/y:x/y);}
template<typename T,typename U>
T floor(T x, U y) {return (x>0?x/y:(x-y+1)/y);}
template<class T,class S>
bool chmax(T &a,const S b) {return (a<b?a=b,1:0);}
template<class T,class S>
bool chmin(T &a,const S b) {return (a>b?a=b,1:0);}
int popcnt(int x) {return __builtin_popcount(x);}
int popcnt(ll x) {return __builtin_popcountll(x);}
int topbit(int x) {return (x==0?-1:31-__builtin_clz(x));}
int topbit(ll x) {return (x==0?-1:63-__builtin_clzll(x));}
int lowbit(int x) {return (x==0?-1:__builtin_ctz(x));}
int lowbit(ll x) {return (x==0?-1:__builtin_ctzll(x));}
#define int long long
#define rep(i,a,b) for(int i=(a);i<=(b);i++)
#define per(i,a,b) for(int i=(a);i>=(b);i--)
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<pii> vp;
typedef tuple<int,int,int> tiii;
int read() {
int x=0,w=1; char c=getchar();
while(!isdigit(c)) {if(c=='-') w=-1; c=getchar();}
while(isdigit(c)) {x=x*10+(c-'0'); c=getchar();}
return x*w;
}
const int N=2e5+5,base=19260817,mod=1e9+7;
int n,a[N],b[N],h[N],d[N],ans;
map<int,int> f[N];
int hsh(int l,int r) {
return (h[r]-h[l-1]*b[r-l+1]%mod+mod)%mod;
}
int lcp(int x,int y) {
int k=0,l=1,r=n-y+1;
while(l<=r) {
int mid=l+r>>1;
if(hsh(x,x+mid-1)==hsh(y,y+mid-1)) k=mid, l=mid+1;
else r=mid-1;
}
return k;
}
void solve() {
n=read(); rep(i,1,n) a[i]=read();
b[0]=1; rep(i,1,n) b[i]=b[i-1]*base%mod;
rep(i,1,n) h[i]=(h[i-1]*base+a[i])%mod;
rep(i,0,n+1) d[i]=0, f[i].clear(); ans=0;
rep(i,1,n) {
//cout<<"WwwwwwwwwwwwwwwwwwwwwwwwwwwwwK "<<i<<endl;
int k=lcp(1,i);
int j=i+k-1; ans+=k;
if(i!=1&&i<=j) {
d[i]+=j-i+1, d[i+1]+=i-j-2, d[j+2]+=1;
//cout<<"RED "<<i<<" "<<j<<" "<<j-i+1<<endl;;
}
if(j<n) {
int p=lcp(k+2,j+2)+1; chmin(p,j-k);
//cout<<" "<<i<<" "<<j<<" "<<k<<" "<<p<<" "<<a[j+1]<<" "<<a[i+p]<<endl;
if(p<j-k||a[k+1]!=a[i+k+p]) {
//cout<<" a "<<j+1<<" "<<p<<" "<<a[k+1]<<" "<<a[i+p]<<endl;
f[j+1][a[k+1]]+=p;
} else {
int q=lcp(j+2,i+k+p+1)+1;
//cout<<" b "<<j+1<<" "<<p<<" "<<q<<endl;
f[j+1][a[k+1]]+=p+q;
}
}
int t=min(i-1,k);
//cout<<i<<" "<<t<<" "<<k<<endl;
if(t) {
d[1]+=k, d[2]-=k+1, d[t+1]-=k-t, d[t+2]+=k-t+1;
//cout<<"DER "<<1<<" "<<t<<" "<<k<<endl;
}
if(i>k+1&&j<n) {
int p=lcp(k+2,j+2)+1;
//cout<<" "<<i<<" "<<j+1<<' '<<k+1<<" "<<a[j+1]<<" "<<p<<endl;
f[k+1][a[j+1]]+=p;
}
}
rep(i,1,n) d[i]+=d[i-1];
rep(i,1,n) d[i]+=d[i-1]; int pans=0;
rep(i,1,n) {
int res=ans-d[i], ex=0;
//cout<<d[i]<<endl;
for(auto [x,y]:f[i]) chmax(ex,y);
res+=ex; pans+=(res^i);
//cout<<i<<" "<<res<<endl;
}
printf("%lld\n",pans);
}
signed main() {
int T=read(); while(T--) solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 18456kb
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: 8ms
memory: 18860kb
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 9 265 363 278 15 95 114 58 348 225 3 335 364 377 316 3 19 122 65 15 83 36 261 10 64 28 90 85 104 252 191 21 48 303 63 102 20 24 68 316 362 266 309 354 281 326 281 231 312 3 330 54 328 8 69 32 147 322 39 338 89 242 3 165 346 245 20 155 3 404 393 392 81 269 360 20 54 21 279 3 17 351 3...
result:
wrong answer 24th lines differ - expected: '66', found: '65'