Submission #558098

#	Time	Username	Problem	Language	Result	Execution time	Memory
558098		nguyen31hoang08minh2003	Jetpack (COCI16_jetpack)	C++14	80 / 80	16 ms	14084 KiB

jetpack

/*

    Saturday                        /\
    May 7th, 2022                  //\\
    03:15 AM                      ///\\\
    07/05/2022                     //\\
    UTC +07                       ///\\\
                                 ////\\\\
                                  ///\\\
                                 ////\\\\
                                /////\\\\\
                                    ||
                                    || The tree
                              ______||__________
*/
#include <bits/stdc++.h>
#define ALL(x) (x).begin(), (x).end()
#define SIZE(x) int((x).size())

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

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

template<class X, class Y>
std::ostream& operator << (std::ostream& outputStream, const std::pair<X, Y> &p) {
    return outputStream << '{' << p.first << ", " << p.second >> '}';
}

template<class T>
std::ostream& operator << (std::ostream& outputStream, const std::vector<T>& values) {
    outputStream << '{';
    for (const T& value : values)
        outputStream << value << ' ';
    return outputStream << '}';
}

using namespace std;

const int ROWS = 10, MAX_N = 1e5 + 5;

signed main() {
    int n;
    string field[ROWS];
    vector<pair<int, int> > result;
    const function<bool(int, int)> DP = [&](const int x, const int y) -> bool {
        static bool seen[ROWS][MAX_N]{}, dp[ROWS][MAX_N]{};
        if (y >= n)
            return true;
        if (x < 0 || x >= ROWS || field[x][y] == 'X')
            return false;
        if (!seen[x][y]) {
            seen[x][y] = true;
            dp[x][y] = DP(max(0, x - 1), y + 1) || DP(min(x + 1, ROWS - 1), y + 1);
        }
        return dp[x][y];
    };
    const function<void(int, int, int)> trace = [&](const int x, const int y, const int z) {
        if (y >= n) {
            if (z)
                result.emplace_back(y - z, z);
            return;
        }
        if (DP(max(0, x - 1), y + 1))
            trace(max(0, x - 1), y + 1, z + 1);
        else {
            if (z)
                result.emplace_back(y - z, z);
            trace(min(x + 1, ROWS - 1), y + 1, 0);
        }
    };
//    freopen("input.INP", "r", stdin);
    cin.tie(0) -> sync_with_stdio(0);
    cout.tie(0);
    cin >> n;
    for (int x = 0; x < ROWS; ++x)
        cin >> field[x];
    trace(ROWS - 1, 0, 0);
    cout << result.size() << '\n';
    for (const auto& [t, x] : result)
        cout << t << ' ' << x << '\n';
    return 0;
}

Compilation message (stderr)

jetpack.cpp: In function 'int main()':
jetpack.cpp:85:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   85 |     for (const auto& [t, x] : result)
      |                      ^

• Subtask 1: 80 / 80