oj.uz

Submission #61871

# Submission time Handle Problem Language Result Execution time Memory
61871 2018-07-27T02:22:32 Z Benq Match (CEOI16_match) C++11
100 / 100
 38 ms 17968 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;
 
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;

typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;

template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;

#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)

#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()

const int MOD = 1000000007;
const ll INF = 1e18;
const int MX = 100001;

string x;
int st[MX][17], pre[MX][26];

bool ok(int l, int r) {
    r ++;
    F0Rd(i,17) if (st[r][i] >= l) r = st[r][i];
    return l == r;
}

vi v;

bool bad(int ind) { return !ok(ind+1,(sz(v)?v.back():sz(x))-1); }
void ad(char c) { v.pb(pre[sz(v) ? v.back() : sz(x)][c-'a']); }
void rem() { v.pop_back(), v.pop_back(); }

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> x;
    F0R(i,sz(x)+1) {
        st[i][0] = (i?pre[i-1][x[i-1]-'a']:-1);
        F0R(j,26) pre[i][j] = (st[i][0] == -1 ? -1 : pre[st[i][0]][j]);
        if (i) pre[i][x[i-1]-'a'] = i-1;
    }
    FOR(j,1,17) F0R(i,sz(x)+1) {
        if (st[i][j-1] == -1) st[i][j] = -1;
        else st[i][j] = st[st[i][j-1]][j-1];
    }
    if (!ok(0,sz(x)-1)) { cout << -1; exit(0); }
    string ans;
    F0R(i,sz(x)) {
        ad(x[i]);
        if (bad(i)) rem(), ans += ')';
        else ans += '('; 
    }
    cout << ans;
}

/* Look for:
* the exact constraints (multiple sets are too slow for n=10^6 :( ) 
* special cases (n=1?)
* overflow (ll vs int?)
* array bounds
*/

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 484 KB Output is correct
3 Correct 2 ms 484 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 484 KB Output is correct
3 Correct 2 ms 484 KB Output is correct
4 Correct 3 ms 676 KB Output is correct
5 Correct 4 ms 676 KB Output is correct
6 Correct 3 ms 748 KB Output is correct
7 Correct 3 ms 824 KB Output is correct

Subtask #3
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 484 KB Output is correct
3 Correct 2 ms 484 KB Output is correct
4 Correct 3 ms 676 KB Output is correct
5 Correct 4 ms 676 KB Output is correct
6 Correct 3 ms 748 KB Output is correct
7 Correct 3 ms 824 KB Output is correct
8 Correct 4 ms 1592 KB Output is correct
9 Correct 4 ms 1720 KB Output is correct
10 Correct 5 ms 1736 KB Output is correct
11 Correct 5 ms 1736 KB Output is correct
12 Correct 27 ms 11096 KB Output is correct
13 Correct 25 ms 11868 KB Output is correct
14 Correct 34 ms 12764 KB Output is correct
15 Correct 28 ms 14556 KB Output is correct
16 Correct 31 ms 14572 KB Output is correct
17 Correct 29 ms 15340 KB Output is correct
18 Correct 35 ms 16272 KB Output is correct
19 Correct 36 ms 17068 KB Output is correct
20 Correct 24 ms 17068 KB Output is correct
21 Correct 38 ms 17968 KB Output is correct