oj.uz

Submission #992016

# Submission time Handle Problem Language Result Execution time Memory
992016 2024-06-03T14:40:40 Z saddd Dabbeh (INOI20_dabbeh) C++17
100 / 100
 798 ms 111164 KB 
#include<bits/stdc++.h>
#include<fstream>
using namespace std;
//#pragma GCC optimize("O3")
#define sz(a) (int)a.size()
#define ALL(v) v.begin(), v.end()
#define ALLR(v) v.rbegin(), v.rend()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
#define mpp make_pair
const ld PI = 3.14159265359, prec = 1e-9;;
//using u128 = __uint128_t;
//const int x[4] = {1, 0, -1, 0};
//const int y[4] = {0, -1, 0, 1};
ll mod = 998244353, pr = 69;
const int mxn = 3e5 + 5, mxq = 1e5 + 5, sq = 1005, mxv = 5e4 + 1, lg = 60;
//const int base = (1 <<18);
const ll inf = 2e9 + 5, neg = -69420, inf2 = 1e14;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll rr(ll l, ll r){
    return(uniform_int_distribution<ll>(l, r)(rng));
}
// have fun!
struct Hash{
    vt<ll>hsh, pw;
    void init(string s){
        pw.resize(sz(s) + 1, 0); hsh.resize(sz(s) + 1, 0);
        for(int i = 0; i < sz(s); i++){
            hsh[i + 1] = (hsh[i] * pr + (s[i] - 'a' + 1)) % mod;
        }
        pw[0] = 1;
        for(int i = 1; i <= sz(s); i++){
            pw[i] = (pw[i - 1] * pr) % mod;
        }
    }
    ll get(int l, int r){
        return((hsh[r + 1] - hsh[l] * pw[r - l + 1] + mod * mod) % mod);
    }
};
Hash ht[mxn + 1], hs;
int n, m;
string t[mxn + 1], s;
pii get(int ids, int idt){
    int l = 1, r = min(sz(s) - ids, sz(t[idt])), ans = 0;
    while(l <= r){
        int mid = (l + r) >> 1;
        if(hs.get(ids, ids + mid - 1) == ht[idt].hsh[mid]){
            ans = mid; l = mid + 1;
        }else{
            r = mid - 1;
        }
    }
    if(ans == min(sz(s) - ids, sz(t[idt]))){
        return(mpp(ans, sz(s) - ids < sz(t[idt])));
    }else{
        return(mpp(ans, s[ids + ans] < t[idt][ans]));
    }
}
int up[mxn + 1][19];
pii mx[mxn + 1][19];
int getmx(int l, int r){
    int lg = __lg(r - l + 1);
    return(max(mx[l][lg], mx[r - (1 << lg) + 1][lg]).se);
}
void solve(){  
    cin >> n >> m;
    mod = rr(1e8, 1e9);
    for(int i = 1; i <= n; i++){
        cin >> t[i]; 
    }
    sort(t + 1, t + n + 1);
    for(int i = 1; i <= n; i++)ht[i].init(t[i]);
    cin >> s; hs.init(s);
    for(int i = 0; i < sz(s); i++){
        int l = 1, r = n, ans = 0;
        while(l <= r){
            int mid = (l + r) >> 1;
            
            pii cand = get(i, mid);
            ans = max(ans, cand.fi);
            if(cand.se == 0){
                l = mid + 1;
            }else{
                r = mid - 1;
            }
            
        }
        up[i][0] = i + ans;
        mx[i][0] = mpp(up[i][0], i);
    }
    for(int i = 1; i < 19; i++){
        for(int j = 0; j + (1 << i) - 1 < sz(s); j++){
            mx[j][i] = max(mx[j][i - 1], mx[j + (1 << (i - 1))][i - 1]);
        }
    }
    up[sz(s)][0] = sz(s);
    for(int i = 1; i < 19; i++){
        deque<int>dq;
        for(int j = sz(s); j >= 0; j--){
            while(sz(dq) && up[j][i - 1] >= up[dq.back()][i - 1])dq.pop_back();
            dq.pb(j);
            int l = 0, r = sz(dq) - 1, ans;
            while(l <= r){
                int mid = (l + r) >> 1;
                if(dq[mid] <= up[j][i - 1]){
                    ans = mid; r = mid - 1;
                }else{
                    l = mid + 1;
                }
            }
            up[j][i] = up[dq[ans]][i - 1];
        }
    }
    
    while(m--){
        int l, r; cin >> l >> r; r--;
        int ans = 0;
        for(int i = 18; i >= 0; i--){
            if(up[l][i] <= r){
                ans += (1 << i); l = getmx(l, up[l][i]);
            }
        }
        
        cout << ((ans == ((1 << 19) - 1)) ? -1 : ans + 1) << "\n";
    }
}
signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    //freopen("TESTROOMS.inp", "r", stdin);
    //freopen("TESTROOMS.out", "w", stdout);
    int tt; tt = 1;
    while(tt--){
        solve();
 
    }
    return(0);
}

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 26968 KB Output is correct
2 Correct 63 ms 34436 KB Output is correct
3 Correct 72 ms 32736 KB Output is correct
4 Correct 93 ms 37460 KB Output is correct
5 Correct 75 ms 36172 KB Output is correct
6 Correct 79 ms 38484 KB Output is correct
7 Correct 81 ms 38900 KB Output is correct
8 Correct 76 ms 38996 KB Output is correct
9 Correct 72 ms 37548 KB Output is correct
10 Correct 61 ms 32084 KB Output is correct
11 Correct 54 ms 37564 KB Output is correct
12 Correct 49 ms 33560 KB Output is correct
13 Correct 54 ms 35924 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 339 ms 99976 KB Output is correct
2 Correct 339 ms 102820 KB Output is correct
3 Correct 321 ms 100324 KB Output is correct
4 Correct 305 ms 98892 KB Output is correct
5 Correct 358 ms 98828 KB Output is correct
6 Correct 342 ms 102696 KB Output is correct
7 Correct 363 ms 103908 KB Output is correct
8 Correct 336 ms 102096 KB Output is correct
9 Correct 338 ms 103024 KB Output is correct
10 Correct 366 ms 103808 KB Output is correct
11 Correct 327 ms 100720 KB Output is correct
12 Correct 323 ms 100116 KB Output is correct
13 Correct 324 ms 104536 KB Output is correct
14 Correct 329 ms 103452 KB Output is correct
15 Correct 294 ms 98260 KB Output is correct
16 Correct 113 ms 103816 KB Output is correct
17 Correct 115 ms 98996 KB Output is correct
18 Correct 111 ms 99000 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 26968 KB Output is correct
2 Correct 63 ms 34436 KB Output is correct
3 Correct 72 ms 32736 KB Output is correct
4 Correct 93 ms 37460 KB Output is correct
5 Correct 75 ms 36172 KB Output is correct
6 Correct 79 ms 38484 KB Output is correct
7 Correct 81 ms 38900 KB Output is correct
8 Correct 76 ms 38996 KB Output is correct
9 Correct 72 ms 37548 KB Output is correct
10 Correct 61 ms 32084 KB Output is correct
11 Correct 54 ms 37564 KB Output is correct
12 Correct 49 ms 33560 KB Output is correct
13 Correct 54 ms 35924 KB Output is correct
14 Correct 339 ms 99976 KB Output is correct
15 Correct 339 ms 102820 KB Output is correct
16 Correct 321 ms 100324 KB Output is correct
17 Correct 305 ms 98892 KB Output is correct
18 Correct 358 ms 98828 KB Output is correct
19 Correct 342 ms 102696 KB Output is correct
20 Correct 363 ms 103908 KB Output is correct
21 Correct 336 ms 102096 KB Output is correct
22 Correct 338 ms 103024 KB Output is correct
23 Correct 366 ms 103808 KB Output is correct
24 Correct 327 ms 100720 KB Output is correct
25 Correct 323 ms 100116 KB Output is correct
26 Correct 324 ms 104536 KB Output is correct
27 Correct 329 ms 103452 KB Output is correct
28 Correct 294 ms 98260 KB Output is correct
29 Correct 113 ms 103816 KB Output is correct
30 Correct 115 ms 98996 KB Output is correct
31 Correct 111 ms 99000 KB Output is correct
32 Correct 454 ms 80760 KB Output is correct
33 Correct 417 ms 84724 KB Output is correct
34 Correct 434 ms 86808 KB Output is correct
35 Correct 416 ms 85780 KB Output is correct
36 Correct 350 ms 87472 KB Output is correct
37 Correct 479 ms 81084 KB Output is correct
38 Correct 755 ms 109640 KB Output is correct
39 Correct 651 ms 105644 KB Output is correct
40 Correct 651 ms 111164 KB Output is correct
41 Correct 582 ms 111108 KB Output is correct
42 Correct 798 ms 107100 KB Output is correct
43 Correct 275 ms 64036 KB Output is correct
44 Correct 341 ms 63860 KB Output is correct
45 Correct 269 ms 62792 KB Output is correct
46 Correct 288 ms 67012 KB Output is correct
47 Correct 728 ms 103924 KB Output is correct
48 Correct 792 ms 106140 KB Output is correct
49 Correct 789 ms 104340 KB Output is correct
50 Correct 789 ms 109808 KB Output is correct
51 Correct 214 ms 102196 KB Output is correct
52 Correct 172 ms 103168 KB Output is correct
53 Correct 215 ms 101784 KB Output is correct