oj.uz

답안 #60638

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
60638 2018-07-24T12:45:15 Z egorlifar parentrises (BOI18_parentrises) C++17
100 / 100
 103 ms 15292 KB 
/*
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 */
#include <iostream>
#include <complex>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <numeric>
#include <cstring>
#include <ctime>
#include <cstdlib>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <list>
#include <cmath>
#include <bitset>
#include <cassert>
#include <queue>
#include <stack>
#include <deque>
    
     
using namespace std;
template<typename T1, typename T2>inline void chkmin(T1 &x, T2 y) { if (x > y) x = y; }
template<typename T1, typename T2>inline void chkmax(T1 &x, T2 y) { if (x < y) x = y; } 
template<typename T, typename U> inline ostream &operator<< (ostream &_out, const pair<T, U> &_p) { _out << _p.first << ' ' << _p.second; return _out; }
template<typename T, typename U> inline istream &operator>> (istream &_in, pair<T, U> &_p) { _in >> _p.first >> _p.second; return _in; }
template<typename T> inline ostream &operator<< (ostream &_out, const vector<T> &_v) { if (_v.empty()) { return _out; } _out << _v.front(); for (auto _it = ++_v.begin(); _it != _v.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T> inline istream &operator>> (istream &_in, vector<T> &_v) { for (auto &_i : _v) { _in >> _i; } return _in; }
template<typename T> inline ostream &operator<< (ostream &_out, const set<T> &_s) { if (_s.empty()) { return _out; } _out << *_s.begin(); for (auto _it = ++_s.begin(); _it != _s.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T> inline ostream &operator<< (ostream &_out, const multiset<T> &_s) { if (_s.empty()) { return _out; } _out << *_s.begin(); for (auto _it = ++_s.begin(); _it != _s.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T> inline ostream &operator<< (ostream &_out, const unordered_set<T> &_s) { if (_s.empty()) { return _out; } _out << *_s.begin(); for (auto _it = ++_s.begin(); _it != _s.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T> inline ostream &operator<< (ostream &_out, const unordered_multiset<T> &_s) { if (_s.empty()) { return _out; } _out << *_s.begin(); for (auto _it = ++_s.begin(); _it != _s.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T, typename U> inline ostream &operator<< (ostream &_out, const map<T, U> &_m) { if (_m.empty()) { return _out; } _out << '(' << _m.begin()->first << ": " << _m.begin()->second << ')'; for (auto _it = ++_m.begin(); _it != _m.end(); ++_it) { _out << ", (" << _it->first << ": " << _it->second << ')'; } return _out; }
template<typename T, typename U> inline ostream &operator<< (ostream &_out, const unordered_map<T, U> &_m) { if (_m.empty()) { return _out; } _out << '(' << _m.begin()->first << ": " << _m.begin()->second << ')'; for (auto _it = ++_m.begin(); _it != _m.end(); ++_it) { _out << ", (" << _it->first << ": " << _it->second << ')'; } return _out; }
#define sz(c) (int)(c).size()
#define all(c) (c).begin(), (c).end()
#define rall(c) (c).rbegin(), (c).rend()
#define left left228
#define right right228
#define next next228
#define rank rank228
#define prev prev228
#define y1 y1228                                                         
#define read(FILENAME) freopen((FILENAME + ".in").c_str(), "r", stdin)
#define write(FILENAME) freopen((FILENAME + ".out").c_str(), "w", stdout)
#define files(FILENAME) read(FILENAME), write(FILENAME)
#define pb push_back
const string FILENAME = "input";
const int Mod = 1000000007;


int sum(int a, int b) {
    return (a + b >= Mod ? a + b - Mod: a + b);
}


void add(int &a, const int &b) {
    a += b;
    if (a >= Mod) {
        a -= Mod;
    }
}


enum Color {
    GREEN = 'G',
    RED = 'R',
    BLUE = 'B',
};
 
template<class F>
string filter(const string& s, const F& pred) {
    string ret;
    for (int i = 0; i < (int) s.length(); ++i) {
        if (pred(i, s[i])) {
            ret += s[i];
        }
    }
    return ret;
}

bool check(string s) {
    int bal = 0;
    for (auto x: s) {
        if (x == '(') {
            bal++;
        } else {
            bal--;
            if (bal < 0) {
                return false;
            }
        }
    }
    return bal == 0;
}


string build(string s) {
    int n = sz(s);
    vector<Color> color(n, Color::GREEN);
    vector<int> greenOpen, greenClosed;
    int balance = 0;
    for (int i = 0; i < n; i++) {
        if (s[i] == '(') {
            greenOpen.pb(i);
            balance++;
        } else {
            balance--;
            greenClosed.pb(i);
            if (balance < 0) {
                balance = 0;
                if (sz(greenClosed) < 2) {
                    return "impossible";
                }
                int pos1 = greenClosed.back();
                greenClosed.pop_back();
                int pos2 = greenClosed.back();
                greenClosed.pop_back();
                color[pos1] = Color::RED;
                color[pos2] = Color::BLUE;
            }
        }
    }
    while (balance-- > 0) {
        if (sz(greenOpen) < 2) {
            return "impossible";
        }
        int pos1 = greenOpen.back();
        greenOpen.pop_back();
        int pos2 = greenOpen.back();
        greenOpen.pop_back();
        color[pos1] = Color::RED;
        color[pos2] = Color::BLUE;
    }
    string s1 = filter(s, [&color](int index, char c) -> bool {
        return color[index] == Color::RED || color[index] == Color::GREEN;
    });
    string s2 = filter(s, [&color](int index, char c) -> bool {
        return color[index] == Color::BLUE || color[index] == Color::GREEN;
    });
    string ans;
    for (int i = 0; i < n; i++) {
        ans += (char)color[i];
    }
    if (check(s1) && check(s2)) {
        return ans;
    } else {
        return "impossible";
    }
}


vector<int> count(int n) {
    vector<vector<int> > dp(n + 5, vector<int>(2 * n + 5, 0));
    auto ndp = dp;
    vector<int> ans(n + 1);
    ans[0] = 1;
    dp[0][0] = 1;
    for (int i = 1; i <= n; i++) {
        for (auto &v: ndp) {
            fill(all(v), 0);
        }
        for (int left = 0; left <= n; left++) {
            for (int right = left; right <= 2 * i; right++) {
                add(ndp[left + 1][right + 2], dp[left][right]);
                int nLeft = max(0, left - 2);
                int nRight = right - 1;
                if (nLeft <= nRight) {
                    add(ndp[nLeft][nRight], dp[left][right]);
                }
            }
        }
        ndp.swap(dp);
        ans[i] = 0;
        for (int right = 0; right <= 2 * i; right++) {
            add(ans[i], dp[0][right]);
        }
    }
    return ans;
}


int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	//read(FILENAME);
    int p;
    cin >> p;
    if (p == 1) {
        int t;
        cin >> t;
        for (int it = 0; it < t; it++) {
            string s;
            cin >> s;
            cout << build(s) << '\n';
        }
    } else {
        vector<int> q;
        int t;
        cin >> t;
        int need = 0;
        for (int it = 0; it < t; it++) {
            int x;
            cin >> x;
            q.pb(x);
            chkmax(need, x);
        }
        vector<int> ans = count(need);
        for (auto x: q) {
            cout << ans[x] << '\n';
        }
    }
	return 0; 		
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 420 KB Output is correct
4 Correct 3 ms 496 KB Output is correct
5 Correct 3 ms 572 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 572 KB Output is correct
2 Correct 2 ms 572 KB Output is correct
3 Correct 3 ms 620 KB Output is correct
4 Correct 3 ms 620 KB Output is correct
5 Correct 3 ms 620 KB Output is correct

Subtask #3
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 572 KB Output is correct
2 Correct 2 ms 572 KB Output is correct
3 Correct 3 ms 620 KB Output is correct
4 Correct 3 ms 620 KB Output is correct
5 Correct 3 ms 620 KB Output is correct
6 Correct 2 ms 620 KB Output is correct
7 Correct 3 ms 620 KB Output is correct
8 Correct 3 ms 620 KB Output is correct
9 Correct 3 ms 620 KB Output is correct
10 Correct 3 ms 732 KB Output is correct

Subtask #4
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 572 KB Output is correct
2 Correct 2 ms 572 KB Output is correct
3 Correct 3 ms 620 KB Output is correct
4 Correct 3 ms 620 KB Output is correct
5 Correct 3 ms 620 KB Output is correct
6 Correct 2 ms 620 KB Output is correct
7 Correct 3 ms 620 KB Output is correct
8 Correct 3 ms 620 KB Output is correct
9 Correct 3 ms 620 KB Output is correct
10 Correct 3 ms 732 KB Output is correct
11 Correct 3 ms 748 KB Output is correct
12 Correct 3 ms 748 KB Output is correct
13 Correct 4 ms 764 KB Output is correct
14 Correct 3 ms 764 KB Output is correct
15 Correct 3 ms 812 KB Output is correct
16 Correct 8 ms 812 KB Output is correct
17 Correct 7 ms 2184 KB Output is correct
18 Correct 7 ms 2184 KB Output is correct
19 Correct 10 ms 2184 KB Output is correct
20 Correct 7 ms 2184 KB Output is correct
21 Correct 59 ms 2184 KB Output is correct
22 Correct 54 ms 15276 KB Output is correct
23 Correct 33 ms 15276 KB Output is correct
24 Correct 41 ms 15276 KB Output is correct
25 Correct 53 ms 15292 KB Output is correct

Subtask #5
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 15292 KB Output is correct

Subtask #6
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 15292 KB Output is correct
2 Correct 3 ms 15292 KB Output is correct

Subtask #7
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 15292 KB Output is correct
2 Correct 3 ms 15292 KB Output is correct
3 Correct 103 ms 15292 KB Output is correct