제출 #711675

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
711675		guagua0407	Slagalica (COCI19_slagalica2)	C++17	0 / 70	33 ms	2648 KiB

slagalica

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end() 
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

int main() {_
    int n;
    cin>>n;
    vector<int> num[9];
    vector<int> adj[9];
    vector<int> sz(9,0);
    for(int i=0;i<n;i++){
        int a,b;
        cin>>a>>b;
        num[a].push_back(b);
        sz[a]++;
    }
    for(int i=1;i<9;i++){
        sort(num[i].rbegin(),num[i].rend());
    }
    adj[1].push_back(3);
    adj[1].push_back(4);
    adj[1].push_back(8);
    adj[3].push_back(3);
    adj[3].push_back(4);
    adj[3].push_back(8);
    adj[5].push_back(3);
    adj[5].push_back(4);
    adj[5].push_back(8);

    adj[2].push_back(1);
    adj[2].push_back(2);
    adj[2].push_back(7);
    adj[4].push_back(1);
    adj[4].push_back(2);
    adj[4].push_back(7);
    adj[6].push_back(1);
    adj[6].push_back(2);
    adj[6].push_back(7);
    int cur=(sz[5]>0?5:6);
    vector<int> ans;
    ans.push_back(num[cur].back());
    num[cur].pop_back();
    sz[cur]--;
    for(int i=0;i<n-2;i++){
        //cout<<cur<<'\n';
        int mn=1e9+1;
        int tt;
        for(auto v:adj[cur]){
            //cout<<v<<' '<<sz[v]<<'\n';
            if(sz[v]==0) continue;
            sz[v]--;
            bool tf=false;
            for(auto u:adj[v]){
                if(i!=n-3 and (u==7 or u==8)) continue;
                if(sz[u]>0){
                    tf=true;
                    break;
                }
            }
            sz[v]++;
            if(tf){
                if(num[v].back()<mn){
                    mn=num[v].back();
                    tt=v;
                }
            }
        }
        if(mn==1e9+1){
            assert(1==0);
            cout<<-1;
            return 0;
        }
        sz[tt]--;
        ans.push_back(num[tt].back());
        num[tt].pop_back();
        cur=tt;
    }
    int target=(sz[7]>0?7:8);
    bool tf=false;
    for(auto v:adj[cur]){
        if(v==target){
            tf=true;
            break;
        }
    }
    if(!tf){
        cout<<-1;
        return 0;
    }
    ans.push_back(num[target].back());
    for(auto v:ans){
        cout<<v<<' ';
    }
    return 0;
}
//maybe its multiset not set

컴파일 시 표준 에러 (stderr) 메시지

slagalica.cpp: In function 'void setIO(std::string)':
slagalica.cpp:12:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
slagalica.cpp:13:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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