제출 #711771

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
711771		Luicosas	Slagalica (COCI19_slagalica2)	C++17	70 / 70	47 ms	8704 KiB

slagalica

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

#define pb push_back
#define sz(x) (int)(x.size())
#define itr(x) x.begin(), x.end()
#define prv(x) for(auto& i : x) cout << i << " "; cout << "\n";
#ifdef LOCAL
#define debug(...) cerr << #__VA_ARGS__ << " : "; for(auto& i : {__VA_ARGS__}) cerr << i << " "; cerr << "\n";
#else 
#define debug(...)
#endif

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

    ll n;
    cin >> n;

    array<int,2> st, en, o{0, 0};
    vector<vector<array<int,2>>> adj(2);
    for(int i = 0; i < n; i++) {
        int type, val;
        cin >> type >> val;
        if(type == 1) {
            adj[0].pb({val, 1});
            o[0] += 1;
            o[1] -= 1;
        } else if(type == 2) {
            adj[0].pb({val, 0});
        } else if(type == 3) {
            adj[1].pb({val, 1});
        } else if(type == 4) {
            adj[1].pb({val, 0});
            o[1] += 1;
            o[0] -= 1;
        } else if(type == 5) {
            st = {1, val};
        } else if(type == 6) {
            st = {0, val};
        } else if(type == 7) {
            en = {0, val};
        } else if(type == 8) {
            en = {1, val};
        } 
    }

    if(st[0] != en[0] && !(o[st[0]] == 1 && o[en[0]] == -1)) {
        cout << -1 << "\n";
        return 0;
    }
    if(st[0] == en[0] && !(o[0] == 0 && o[1] == 0)) {
        cout << -1 << "\n";
        return 0;
    }

    sort(itr(adj[0]));
    sort(itr(adj[1]));
    vector<int> ans, checked(2, 0);
    function<void(int)> dfs = [&](int idx) {
        if(checked[idx] == sz(adj[idx])) {
            return;
        } 

        while(checked[idx] < sz(adj[idx])) {
            auto& e = adj[idx][checked[idx]]; 
            checked[idx]++;
            dfs(e[1]);
            ans.pb(e[0]);
        }
    };
    dfs(st[0]);

    cout << st[1] << " ";
    for(int i = n - 3; i >= 0; i--) {
        cout << ans[i] << " ";
    }
    cout << en[1] << "\n";
}

컴파일 시 표준 에러 (stderr) 메시지

slagalica.cpp: In function 'int main()':
slagalica.cpp:52:23: warning: 'en.std::array<int, 2>::_M_elems[0]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   52 |     if(st[0] != en[0] && !(o[st[0]] == 1 && o[en[0]] == -1)) {
slagalica.cpp:52:23: warning: 'st.std::array<int, 2>::_M_elems[0]' may be used uninitialized in this function [-Wmaybe-uninitialized]
slagalica.cpp:82:22: warning: 'en.std::array<int, 2>::_M_elems[1]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   82 |     cout << en[1] << "\n";
      |                      ^~~~
slagalica.cpp:78:22: warning: 'st.std::array<int, 2>::_M_elems[1]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   78 |     cout << st[1] << " ";
      |                      ^~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 5 / 5
• Subtask 9: 5 / 5
• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
• Subtask 12: 5 / 5
• Subtask 13: 5 / 5
• Subtask 14: 5 / 5