oj.uz

Submission #795338

# Submission time Handle Problem Language Result Execution time Memory
795338 2023-07-27T08:28:10 Z MISM06 Dabbeh (INOI20_dabbeh) C++14
0 / 100
 2000 ms 59996 KB 
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair < int , int > pii;
typedef pair < int , pii > piii;
typedef pair < ll , ll > pll;
typedef pair < ll , pll > plll;
#define pb  push_back
#define all(x)  x.begin(), x.end()
#define sze     size()
#define F   first
#define S   second
#define kids    int mid = (tl + tr) >> 1, cl = v << 1, cr = v << 1 | 1
#define wall__ cout << "________________________________________\n";

const ll p = 727, mod1 = 1e9 + 7, mod2 = 1e9 + 9;
const ll N = 3e5 + 10;
const ll inf = 1e9 + 10;

inline void add (pll &x, pll y) {
    x = {(x.F + y.F + mod1) % mod1, (x.S + y.S + mod2) % mod2};
}
inline pll Sum (pll x, pll y) {
    return {(x.F + y.F + mod1) % mod1, (x.S + y.S + mod2) % mod2};
}
inline pll mul (pll x, pll y) {
    return {x.F * y.F % mod1, x.S * y.S % mod2};
} 
inline ll pw (ll x, ll y, ll mod) {
    ll res = 1;
    while(y) {
        if (y & 1) res = x * res % mod;
        x = x * x % mod;
        y >>= 1;
    }
    return res;
}
pll pp[N], inv[N];
int n, m, nn;
string t[N], s;
int L[N], R[N];
int a[N];
pll h[N];
vector < pll > o;
int dp[N];

inline pll get (int l, int r) {
    return mul(inv[l - 1], Sum(h[r], {-h[l - 1].F, -h[l - 1].S}));
}
bool find (pll x) {
    auto it = lower_bound(all(o), x);
    if (it == o.end()) return 0;
    pll y = *it;
    if (y.F == x.F && y.S == x.S) return 1;
    return 0;
}
 
ll seg[N << 2];
void build (int v = 1, int tl = 1, int tr = n + 1) {
    if (tl == tr) {
        seg[v] = inf;
        return;
    } kids;
    build(cl, tl, mid);
    build(cr, mid + 1, tr);
    seg[v] = inf;
}
void upd (int val, int pos, int v = 1, int tl = 1, int tr = n + 1) {
    if (tl == tr) {
        seg[v] = val;
        return;
    } kids;
    if (pos <= mid) upd(val, pos, cl, tl, mid);
    else upd(val, pos, cr, mid + 1, tr);
    seg[v] = min(seg[cl], seg[cr]);
}
int ask (int l, int r, int v = 1, int tl = 1, int tr = n + 1) {
    if (l > r) return inf;
    if (l == tl && r == tr) return seg[v];
    kids;
    return min(ask(l, min(r, mid), cl, tl, mid), ask(max(l, mid + 1), r, cr, mid + 1, tr));
}

void solve () {
    cin >> nn >> m;
    for (int i = 1; i <= nn; i++) cin >> t[i];
    cin >> s; n = s.sze;
    h[0] = {0, 0};
    for (int i = 1; i <= n; i++) h[i] = Sum(h[i - 1], mul(pp[i], {s[i - 1], s[i - 1]}));
    for (int i = 1; i <= m; i++) {
        cin >> L[i] >> R[i];
        ++L[i];
    }
    for (int i = 1; i <= nn; i++) {
        pll x = {0, 0};
        for (int j = 0; j < t[i].sze; j++) {
            x = Sum(x, mul(pp[j + 1], {t[i][j], t[i][j]}));
            o.pb(x);
        }
    }
    sort(all(o));
    // cout << "* " << find(get(4, 5)) << '\n';
    // pll x = get(4, 5);
    // cout << "** " << x.F << " , " << x.S << '\n';
    // for (auto e : o) {
    //     cout << e.F << "," << e.S << " | ";
    // }
    // cout << '\n';
    for (int i = 1; i <= n; i++) {
        if (!find(get(i, i))) continue;
        int l = 1, r = n - i + 2, mid;
        while(r - l > 1) {
            mid = (l + r) / 2;
            if (find(get(i, i + mid - 1))) l = mid;
            else r = mid;
        }
        a[i] = l;
    }
    // for (int i = 1; i <= n; i++) {
    //     cout << a[i] << " ";
    // }
    // cout << '\n';
    build();
    for (int i = 1; i <= m; i++) {
        int l = L[i], r = R[i];
        upd(0, r + 1);
        for (int j = r; j >= l; --j) {
            int x = ask(j + 1, min(j + a[j], r + 1)) + 1;
            upd(x, j);
            // cout << j << " : " << x << '\n';
        }
        int res = ask(l, l);
        // cout << l << " , " << r << " = ";
        if (res >= inf) cout << -1 << '\n';
        else cout << res << '\n';
        // wall__
    }
}

int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    pp[0] = {1, 1};
    for(int i = 1; i < N; i++) pp[i] = mul(pp[i - 1], {p, p});
    inv[N - 1] = {pw(pp[N - 1].F, mod1 - 2, mod1), pw(pp[N - 1].S, mod2 - 2, mod2)};
    for (int i = N - 2; i >= 0; --i) inv[i] = mul(inv[i + 1], {p, p});

    solve();
    return 0;
}

Compilation message

Main.cpp: In function 'void solve()':
Main.cpp:97:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |         for (int j = 0; j < t[i].sze; j++) {
      |                           ^

Subtask #1
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 19028 KB Output is correct
2 Correct 759 ms 30488 KB Output is correct
3 Execution timed out 2059 ms 30392 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 925 ms 36600 KB Output is correct
2 Correct 1093 ms 38804 KB Output is correct
3 Correct 955 ms 37116 KB Output is correct
4 Correct 853 ms 35460 KB Output is correct
5 Correct 927 ms 35460 KB Output is correct
6 Correct 858 ms 38888 KB Output is correct
7 Correct 948 ms 39928 KB Output is correct
8 Correct 924 ms 38080 KB Output is correct
9 Correct 936 ms 39244 KB Output is correct
10 Correct 1006 ms 40292 KB Output is correct
11 Correct 1004 ms 36972 KB Output is correct
12 Correct 1049 ms 36612 KB Output is correct
13 Correct 1102 ms 40704 KB Output is correct
14 Correct 1105 ms 40008 KB Output is correct
15 Correct 805 ms 35036 KB Output is correct
16 Runtime error 47 ms 59996 KB Execution killed with signal 11
17 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 19028 KB Output is correct
2 Correct 759 ms 30488 KB Output is correct
3 Execution timed out 2059 ms 30392 KB Time limit exceeded
4 Halted 0 ms 0 KB -