#define here cerr<<"===========================================\n"
#define dbg(x) cerr<<#x<<": "<<x<<endl;
#include "bits/stdc++.h"
//#include <ext/pb_ds/tree_policy.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
#define ld double
#define ll long long
#define llinf 100000000000000000LL // 10^17
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define all(a) a.begin(),a.end()
#define ceri(a,l,r) {cerr<<#a<<": ";for(ll i_ = l;i_<=r;i_++) cerr<<a[i_]<< " ";cerr<<endl;}
#define cer(a) {cerr<<#a<<": ";for(ll x_ : a) cerr<<x_<< " ";cerr<<endl;}
#define daj_mi_malo_vremena ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
using namespace std;
//using namespace __gnu_pbds;
/*
ll add(ll x,ll y){
x+=y;
if(x<0){
x%=mod;
x+=mod;
}else{
if(x>=mod) x%=mod;
}
return x;
}
ll mul(ll a,ll b){
ll ans = (a*b)%mod;
if(ans<0) ans+=mod;
return ans;
}
ll po(ll x,ll y){
if(y==0) return 1LL;
ll ans = po(x,y/2);
ans = mul(ans,ans);
if(y&1) ans = mul(ans,x);
return ans;
}
ll inv(ll x){return po(x,mod-2);}
*/
/*
typedef tree<int,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
typedef tree<int,null_type,less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_multiset;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll rnd(ll l,ll r){
return uniform_int_distribution<ll>(l,r)(rng);
}
*/
#define maxn 4005
ll n,m;
ll dpl[maxn][maxn],dpu[maxn][maxn];
string a,b;
void upd(string a,string b,ll x,ll y){
ll c = (a[x-1]==b[y-1])|dpu[x][y-1]|dpl[x-1][y];
dpl[x][y] = c-dpu[x][y-1];
dpu[x][y] = c-dpl[x-1][y];
}
ll reshi(string a,string b){
b+=b;
n = a.size();
m = b.size();
for(ll i = 0;i<=n;i++) for(ll j = 0;j<=m;j++) dpu[i][j] = dpl[i][j] = 0;
for(ll i = 1;i<=n;i++) for(ll j = 1;j<=m;j++) upd(a,b,i,j);
ll ans = 0;
for(ll i = 1;i<=n;i++) ans+=dpu[i][m/2];
for(ll j = 1;j<m/2;j++){
for(ll x = 1,y = j;x<=n&&y<=m;){
ll last = dpu[x][y];
if(j==y) dpu[x][y] = 0;
else upd(a,b,x,y);
if(last==dpu[x][y]) x++;
else y++;
}
ll cur = 0;
for(ll i = 1;i<=n;i++) cur+=dpu[i][j+m/2];
ans = max(ans,cur);
}
return ans;
}
void tc(){
cin >> a >> b;
ll ans = reshi(a,b);
reverse(all(b));
ans = max(ans,reshi(a,b));
cout<<ans<<endl;
}
int main(){
daj_mi_malo_vremena
int t; t = 1;
while(t--){
tc();
}
return 0;
}
/**
algorithm
grammar
4
**/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
468 KB |
Output is correct |
| 4 |
Correct |
1 ms |
724 KB |
Output is correct |
| 5 |
Correct |
2 ms |
596 KB |
Output is correct |
| 6 |
Correct |
47 ms |
11476 KB |
Output is correct |
| 7 |
Correct |
619 ms |
39728 KB |
Output is correct |
| 8 |
Correct |
1330 ms |
39732 KB |
Output is correct |
| 9 |
Correct |
1205 ms |
39728 KB |
Output is correct |
| 10 |
Correct |
1141 ms |
39724 KB |
Output is correct |
| 11 |
Correct |
1264 ms |
43652 KB |
Output is correct |
| 12 |
Correct |
1815 ms |
50228 KB |
Output is correct |
| 13 |
Correct |
1786 ms |
50232 KB |
Output is correct |
| 14 |
Correct |
1458 ms |
45444 KB |
Output is correct |
| 15 |
Correct |
1970 ms |
53184 KB |
Output is correct |
| 16 |
Correct |
1635 ms |
43580 KB |
Output is correct |
| 17 |
Correct |
978 ms |
37936 KB |
Output is correct |
| 18 |
Correct |
1728 ms |
53312 KB |
Output is correct |
| 19 |
Correct |
1071 ms |
39736 KB |
Output is correct |
| 20 |
Correct |
1463 ms |
47648 KB |
Output is correct |
| 21 |
Correct |
198 ms |
22100 KB |
Output is correct |
| 22 |
Correct |
361 ms |
29008 KB |
Output is correct |
| 23 |
Correct |
548 ms |
34644 KB |
Output is correct |
| 24 |
Correct |
608 ms |
36544 KB |
Output is correct |
| 25 |
Correct |
863 ms |
44748 KB |
Output is correct |
