/**
* Author: Anil Byar
**/
#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
// template<class T>
// using ordered_set = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)(x).size()
#define ft first
#define sd second
#define pb push_back
// Source: https://codeforces.com/blog/entry/68809
// { start
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '"' << x << '"';}
void __print(const string &x) {cerr << '"' << x << '"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif
// } end
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vl;
typedef vector<pll> vll;
typedef vector<vi> vvi;
typedef vector<vii> vvii;
typedef vector<vl> vvl;
#define dbg if(0)
const ll MOD = 1e9+7;
const ll MOD9 = 998244353;
const ll INFLL = 1e18+5;
const int INF = 1e9;
const int maxN = 101;
const int maxK = 8001;
void printbit(int x, int len) {string s="\n";while(len--){s=((x%2)?'1':'0')+s;x/=2;} cout<<s;}
ll power(ll x, ll y, ll mod){if (y==0) return 1;ll ret = power(x, y/2, mod);ret *= ret;ret%=mod;if (y&1) ret *= x;return ret%mod;}
ll modinv(ll x, ll mod = MOD) {return power(x, mod-2, mod);}
template<class T>
istream& operator>>(istream&in, vector<T>&v){
for (T& x:v) in>>x;
return in;
}
template<class T>
ostream& operator<<(ostream&out, vector<T>&v){
for (T& x:v) out<<x<<' ';
out<<'\n';
return out;
}
vector<int> pi(const string &s, const string& t) {
int n = (int)s.size();
vector<int> pi_s(n);
for (int i = 1, j = 0; i < n; i++) {
while (j > 0 && s[j] != s[i]) { j = pi_s[j - 1]; }
if (s[i] == s[j]) { j++; }
pi_s[i] = j;
}
n = sz(t);
vi ans(n);
for (int i = 0, j = 0; i < n; i++){
while(j>0 && s[j]!=t[i]) j = pi_s[j-1];
if (s[j]==t[i]) j++;
ans[i] = j;
}
return ans;
}
void solve(){
string s, t;
cin>>s>>t;
int n = sz(s), m = sz(t);
vvi pfx(n+5, vi(m+5));
for (int i = 0;i<n;i++){
pfx[i] = pi(s.substr(i, n-i), t);
pfx[i].pb(0);
}
// cout<<pfx;
int ans = 0, p1 = -1, p2 = -1;
for (int i = 0;i<m;i++){
for (int j = 0;j<n;j++){
int len = pfx[j][i];
int len1 = (i>=len && j+len<n)?pfx[j+len][i-len]:0;
// debug(i, j, len, len1);
if (len+len1>=ans){
ans = len+len1;
p2 = i-ans+1;
p1 = j;
}
}
}
// debug(ans, p1, p2);
// if (ans){
// cout<<s.substr(p1, ans)<<endl;
// cout<<t.substr(p2, ans)<<endl;
// }
reverse(all(t));
for (int i = 0;i<n;i++){
pfx[i] = pi(s.substr(i, n-i), t);
pfx[i].pb(0);
}
for (int i = 0;i<m;i++){
for (int j = 0;j<n;j++){
int len = pfx[j][i];
int len1 = (i>=len && j+len<n)?pfx[j+len][i-len]:0;
if (len+len1>=ans){
ans = len+len1;
p2 = m-i-1;
p1 = j;
}
// debug(ans, l, r);
}
}
// debug(ans, p1, p2);
// reverse(all(t));
// if (ans){
// cout<<s.substr(p1, ans)<<endl;
// cout<<t.substr(p2, ans)<<endl;
// }
cout<<ans<<'\n';
cout<<p1<<' '<<p2;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
// #define ONLINE_JUDGE
// #ifndef ONLINE_JUDGE
// freopen("./input/input24.txt", "r", stdin);
// freopen("output.out", "w", stdout);
// freopen("debug.dbg", "w", stderr);
// int tt = clock();
// #endif
int t=1, i = 1;
// cin>>t;
while(t--){
// cout<<"Case #"<<i++<<": ";
solve();
cout<<'\n';
}
// #ifndef ONLINE_JUDGE
// cerr << "TIME = " << (float)(clock() - tt)/CLOCKS_PER_SEC << endl;
// tt = clock();
// #endif
}
Compilation message
necklace.cpp: In function 'int main()':
necklace.cpp:180:14: warning: unused variable 'i' [-Wunused-variable]
180 | int t=1, i = 1;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
4 ms |
1620 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1540 KB |
Output is correct |
| 8 |
Partially correct |
3 ms |
1364 KB |
Output is partially correct |
| 9 |
Correct |
3 ms |
1492 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1492 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1492 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1492 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
4 ms |
1620 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1540 KB |
Output is correct |
| 8 |
Partially correct |
3 ms |
1364 KB |
Output is partially correct |
| 9 |
Correct |
3 ms |
1492 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1492 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1492 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1492 KB |
Output is correct |
| 13 |
Correct |
278 ms |
59448 KB |
Output is correct |
| 14 |
Correct |
242 ms |
59444 KB |
Output is correct |
| 15 |
Partially correct |
261 ms |
64540 KB |
Output is partially correct |
| 16 |
Partially correct |
256 ms |
58596 KB |
Output is partially correct |
| 17 |
Correct |
207 ms |
57424 KB |
Output is correct |
| 18 |
Correct |
211 ms |
59052 KB |
Output is correct |
| 19 |
Correct |
223 ms |
58828 KB |
Output is correct |
| 20 |
Correct |
232 ms |
57420 KB |
Output is correct |
| 21 |
Correct |
238 ms |
57940 KB |
Output is correct |
