Submission #846617

#	Time	Username	Problem	Language	Result	Execution time	Memory
846617		fanwen	Match (CEOI16_match)	C++17	0 / 100	1 ms	344 KiB

match

#include <bits/stdc++.h>

using namespace std;

#define MASK(x) (1LL << (x))
#define BIT(x, i) (((x) >> (i)) & 1)
#define ALL(x) (x).begin(), (x).end()
#define REP(i, n) for (int i = 0, _n = n; i < _n; ++i)
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORD(i, a, b) for (int i = (a), _b = (b); i >= _b; --i)
#define FORE(i, a, b) for (int i = (a), _b = (b); i < _b; ++i)
#define debug(...) "[" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
#define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }

template <class A, class B> bool minimize(A &a, B b)  { if (a > b) { a = b; return true; } return false; }
template <class A, class B> bool maximize(A &a, B b)  { if (a < b) { a = b; return true; } return false; }

bool check(const string &s) {
    int d = 0;
    REP(i, (int) s.size()) {
        d += (s[i] == '(' ? 1 : -1);
        if(d < 0) return false;
    }
    return d == 0;
}

void you_make_it(void) {
    string s; cin >> s;
    stack <char> st;
    string tmp = "";
    REP(i, (int) s.size()) {
        if(st.empty() || (!st.empty() && st.top() != s[i])) {
            st.push(s[i]);
            tmp.push_back('(');
        } else {
            st.pop();
            tmp.push_back(')');
        }
    }
    cout << (check(tmp) ? tmp : "-1");
}

signed main() {

#ifdef LOCAL
    freopen("TASK.inp", "r", stdin);
    freopen("TASK.out", "w", stdout);
#endif
    auto start_time = chrono::steady_clock::now();

    cin.tie(0), cout.tie(0) -> sync_with_stdio(0);

    you_make_it();

    auto end_time = chrono::steady_clock::now();

    cerr << "\nExecution time : " << chrono::duration_cast <chrono::milliseconds> (end_time - start_time).count() << "[ms]" << endl;

    return (0 ^ 0);
}

// Dream it. Wish it. Do it.

• Subtask 1: 0 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 63