제출 #1293921

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1293921		trandangquang	Long Mansion (JOI17_long_mansion)	C++20	100 / 100	204 ms	27700 KiB

long_mansion

#include<bits/stdc++.h>
using namespace std;

#define foru(i,a,b) for(int i=(a); i<=(b); ++i)
#define ford(i,a,b) for(int i=(a); i>=(b); --i)
#define rep(i,a) for(int i=0; i<(a); ++i)
#define sz(a) (int)(a).size()
#define all(a) (a).begin(),(a).end()
#define bit(s,i) (((s)>>(i))&1)
#define ii pair<int,int>
#define vi vector<int>
#define vii vector<ii>
#define fi first
#define se second
#define ll long long
#define eb emplace_back
#define pb push_back
#define __builtin_popcount __builtin_popcountll
#define _ << " " <<

template <class X, class Y> bool maxi(X &x, Y y){return x<y?x=y,true:false;}
template <class X, class Y> bool mini(X &x, Y y){return x>y?x=y,true:false;}

const int N=5e5+5;

int n,c[N],l[N],r[N];
vector<int> v[N];

bool chk(int l, int r, int x){
    auto it=lower_bound(all(v[x]),l);
    return it!=v[x].end() && *it<=r;
}

void solve(){
    cin>>n;
    foru(i,1,n-1) cin>>c[i];
    foru(i,1,n){
        int x; cin>>x;
        foru(j,1,x){
            int y; cin>>y;
            v[y].eb(i);
        }
    }

    foru(i,1,n){
        l[i]=r[i]=i;
        while(true){
            if(l[i]>1 && chk(l[i],r[i],c[l[i]-1])){
                r[i]=max(r[i],r[l[i]-1]);
                l[i]=l[l[i]-1];
            } else{
                if(chk(l[i],r[i],c[r[i]])){
                    ++r[i];
                } else{
                    break;
                }
            }
        }
    }

    int q; cin>>q;
    rep(i,q){
        int x,y; cin>>x>>y;
        cout<<((l[x]<=y&&y<=r[x])?"YES":"NO")<<'\n';
    }
}

int32_t main(){
    #define task "test"
    if(fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    cin.tie(0)->sync_with_stdio(0);

    int tc=1; //cin>>tc;
    foru(i,1,tc){
        solve();
    }
}

컴파일 시 표준 에러 (stderr) 메시지

long_mansion.cpp: In function 'int32_t main()':
long_mansion.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
long_mansion.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 15 / 15
• Subtask 4: 75 / 75