#include <bits/stdc++.h>
// cut here
#ifdef _MSC_VER
#include <intrin.h>
#endif
namespace atcoder {
namespace internal {
int ceil_pow2(int n) {
int x = 0;
while ((1U << x) < (unsigned int)(n)) x++;
return x;
}
int bsf(unsigned int n) {
#ifdef _MSC_VER
unsigned long index;
_BitScanForward(&index, n);
return index;
#else
return __builtin_ctz(n);
#endif
}
} // namespace internal
} // namespace atcoder
namespace atcoder {
template <class S, S (*op)(S, S), S (*e)()> struct segtree {
public:
segtree() : segtree(0) {}
segtree(int n) : segtree(std::vector<S>(n, e())) {}
segtree(const std::vector<S>& v) : _n(int(v.size())) {
log = internal::ceil_pow2(_n);
size = 1 << log;
d = std::vector<S>(2 * size, e());
for (int i = 0; i < _n; i++) d[size + i] = v[i];
for (int i = size - 1; i >= 1; i--) {
update(i);
}
}
void set(int p, S x) {
assert(0 <= p && p < _n);
p += size;
d[p] = x;
for (int i = 1; i <= log; i++) update(p >> i);
}
S get(int p) {
assert(0 <= p && p < _n);
return d[p + size];
}
S prod(int l, int r) {
assert(0 <= l && l <= r && r <= _n);
S sml = e(), smr = e();
l += size;
r += size;
while (l < r) {
if (l & 1) sml = op(sml, d[l++]);
if (r & 1) smr = op(d[--r], smr);
l >>= 1;
r >>= 1;
}
return op(sml, smr);
}
S all_prod() { return d[1]; }
template <bool (*f)(S)> int max_right(int l) {
return max_right(l, [](S x) { return f(x); });
}
template <class F> int max_right(int l, F f) {
assert(0 <= l && l <= _n);
assert(f(e()));
if (l == _n) return _n;
l += size;
S sm = e();
do {
while (l % 2 == 0) l >>= 1;
if (!f(op(sm, d[l]))) {
while (l < size) {
l = (2 * l);
if (f(op(sm, d[l]))) {
sm = op(sm, d[l]);
l++;
}
}
return l - size;
}
sm = op(sm, d[l]);
l++;
} while ((l & -l) != l);
return _n;
}
template <bool (*f)(S)> int min_left(int r) {
return min_left(r, [](S x) { return f(x); });
}
template <class F> int min_left(int r, F f) {
assert(0 <= r && r <= _n);
assert(f(e()));
if (r == 0) return 0;
r += size;
S sm = e();
do {
r--;
while (r > 1 && (r % 2)) r >>= 1;
if (!f(op(d[r], sm))) {
while (r < size) {
r = (2 * r + 1);
if (f(op(d[r], sm))) {
sm = op(d[r], sm);
r--;
}
}
return r + 1 - size;
}
sm = op(d[r], sm);
} while ((r & -r) != r);
return 0;
}
private:
int _n, size, log;
std::vector<S> d;
void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); }
};
} // namespace atcoder
// cut here
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3NRqilq ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// snuke's mod int
template <ll mod>
struct modint{
ll x;
modint(ll x=0):x((x%mod+mod)%mod){}
modint operator-()const{return modint(-x);}
modint& operator+=(const modint a){if((x+=a.x)>=mod) x-=mod; return *this;}
modint& operator-=(const modint a){if((x+=mod-a.x)>=mod) x-=mod; return *this;}
modint& operator*=(const modint a){(x*=a.x)%=mod; return *this;}
modint operator+(const modint a)const{modint res(*this); return res+=a;}
modint operator-(const modint a)const{modint res(*this); return res-=a;}
modint operator*(const modint a)const{modint res(*this); return res*=a;}
modint pow(ll n)const{
modint res=1,x(*this);
while(n){
if(n&1)res*=x;
x*=x;
n>>=1;
}
return res;
}
modint inv()const{return pow(mod-2);}
};
// include mint here
using hshmint=modint<1000000007>;
using hshmint1=modint<998244353>;
using magicpair=pair<hshmint,hshmint1>;
vec(hshmint) pw,invpw;
vec(hshmint1) pw1,invpw1;
vec(magicpair) hsh;
struct rollhsh{
hshmint _p=9973; // base
hshmint1 _p1=257; // base1
rollhsh(string s=""){
init(s);
}
void init(string s){
// put this out in global if multiple testcases
hsh.clear();
pw.clear();
invpw.clear();
pw1.clear();
invpw1.clear();
hsh.resize(sz(s)+1);
pw.resize(sz(s)+1);
invpw.resize(sz(s)+1);
pw1.resize(sz(s)+1);
invpw1.resize(sz(s)+1);
hsh[0]={1,1};
pw[0]=1;
pw1[0]=1;
invpw[0]=1;
invpw1[0]=1;
hshmint _invbase=_p.x;
hshmint1 _invbase1=_p1.x;
_invbase=_invbase.inv(); _invbase1=_invbase1.inv();
rep(i,sz(s)){
pw[i+1]=pw[i]*_p;
pw1[i+1]=pw1[i]*_p1;
invpw[i+1]=invpw[i]*_invbase;
invpw1[i+1]=invpw1[i]*_invbase1;
hshmint x=(int)(s[i]-'a'+1);
hshmint1 x1=(int)(s[i]-'a'+1);
hsh[i+1]={hsh[i].fi+pw[i]*x,hsh[i].se+pw1[i]*x1};
}
}
pair<ll,ll> get(int l,int r){
// from - to , inclusive
hshmint _f=invpw[l]*(hsh[r+1].fi-hsh[l].fi);
hshmint1 _s=invpw1[l]*(hsh[r+1].se-hsh[l].se);
return {_f.x,_s.x};
}
};
#define all(a) a.begin(),a.end()
vi eval_pf(const string&s){
int n=sz(s);
vi pf(n);
rng(i,1,n){
int j=pf[i-1];
while(j and s[i]!=s[j]){
j=pf[j-1];
}
j+=(s[i]==s[j]);
pf[i]=j;
}
return pf;
}
vi eval_pf1(const string&s){
int n=sz(s);
rollhsh _hsh(s); // please don't tle
vi pf(n);
int frm=-1;
rep(i,n){
if(s[i]=='.'){
frm=i;
}
}
frm++;
rng(i,frm,n){
int l=1,r=n-i;
int c=0;
while(l<=r){
int m=(l+r)/2;
if(_hsh.get(0,m-1)==_hsh.get(i,i+m-1)){
c=m,l=m+1;
}else{
r=m-1;
}
}
pf[i]=c;
}
return pf;
}
pii op(pii l,pii r){return l.fi>r.fi?l:r;}
pii e(){return {0,-1};}
signed main(){
_3NRqilq;
string s;
cin>>s;
string t;
cin>>t;
string rt=t;
reverse(all(rt));
int n=sz(s);
int m=sz(t);
int len=0;
pii p={0,0};
rep(_,2){
rep(i,n)
{
vi a(m);
if(i<n-1){
string cur=s.substr(i+1,n-i-1);
cur+=".";
cur+=rt;
auto pfa=eval_pf(cur);
rng(j,n-i,sz(cur)){
a[m-(j-(n-i))-1]=pfa[j];
}
}
vi b(m);
if(i){
string cur="";
cur+=s.substr(0,i);
reverse(all(cur));
cur+=".";
cur+=t;
auto pfb=eval_pf1(cur);
rng(j,i+1,sz(cur)){
b[j-(i+1)]=pfb[j];
}
}
atcoder::segtree<pii,op,e> seg(m+1);
rep(i,m+1){
if(i==m){
seg.set(i,{m,i});
}else{
seg.set(i,{a[i]+i,i});
}
}
rep(j,m){
if(s[i]==t[j]){
if(j+1<m){
int frm=j+1;
int to=frm+b[frm]-1;
pii q=seg.prod(frm,to+2);
int now=q.fi-frm+1;
if(now>len){
len=now;
int ni=i-(q.se-frm);
p={ni,j};
if(_==1){
p={n-ni-now,j};
}
}
}
{
int now=1;
if(now>len){
len=now;
int ni=i;
p={ni,j};
if(_==1){
p={n-ni-now,j};
}
}
}
}
}
}
reverse(all(s));
}
cout<<len<<"\n";
cout<<p.fi<<" "<<p.se<<"\n";
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
340 KB |
Output is correct |
| 2 |
Correct |
6 ms |
340 KB |
Output is correct |
| 3 |
Correct |
4 ms |
340 KB |
Output is correct |
| 4 |
Correct |
4 ms |
340 KB |
Output is correct |
| 5 |
Correct |
4 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
340 KB |
Output is correct |
| 2 |
Correct |
6 ms |
340 KB |
Output is correct |
| 3 |
Correct |
4 ms |
340 KB |
Output is correct |
| 4 |
Correct |
4 ms |
340 KB |
Output is correct |
| 5 |
Correct |
4 ms |
340 KB |
Output is correct |
| 6 |
Correct |
83 ms |
556 KB |
Output is correct |
| 7 |
Correct |
73 ms |
416 KB |
Output is correct |
| 8 |
Correct |
63 ms |
432 KB |
Output is correct |
| 9 |
Correct |
70 ms |
428 KB |
Output is correct |
| 10 |
Correct |
64 ms |
440 KB |
Output is correct |
| 11 |
Correct |
64 ms |
448 KB |
Output is correct |
| 12 |
Correct |
67 ms |
440 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
340 KB |
Output is correct |
| 2 |
Correct |
6 ms |
340 KB |
Output is correct |
| 3 |
Correct |
4 ms |
340 KB |
Output is correct |
| 4 |
Correct |
4 ms |
340 KB |
Output is correct |
| 5 |
Correct |
4 ms |
340 KB |
Output is correct |
| 6 |
Correct |
83 ms |
556 KB |
Output is correct |
| 7 |
Correct |
73 ms |
416 KB |
Output is correct |
| 8 |
Correct |
63 ms |
432 KB |
Output is correct |
| 9 |
Correct |
70 ms |
428 KB |
Output is correct |
| 10 |
Correct |
64 ms |
440 KB |
Output is correct |
| 11 |
Correct |
64 ms |
448 KB |
Output is correct |
| 12 |
Correct |
67 ms |
440 KB |
Output is correct |
| 13 |
Execution timed out |
1581 ms |
916 KB |
Time limit exceeded |
| 14 |
Halted |
0 ms |
0 KB |
- |
