Submission #296176

#	Time	Username	Problem	Language	Result	Execution time	Memory
296176		BThero	Long Mansion (JOI17_long_mansion)	C++17	10 / 100	267 ms	7172 KiB

long_mansion

// chrono::system_clock::now().time_since_epoch().count()
#include<bits/stdc++.h>

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define debug(x) cerr << #x << " = " << x << endl;

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

const int MAXN = (int)5e3 + 5;

vector<int> keys[MAXN];
pii seg[MAXN];
int betw[MAXN];
int n, q;
int own[MAXN];

void solve() {
  scanf("%d", &n);
  
  for (int i = 1; i < n; ++i) {
    scanf("%d", &betw[i]);
  }
  
  for (int i = 1; i <= n; ++i) {
    int sz;
    scanf("%d", &sz);
    keys[i].resize(sz);
    
    for (int j = 0; j < sz; ++j) {
      scanf("%d", &keys[i][j]);
    }
  }
  
  for (int i = 1; i <= n; ++i) {
    int L = i, R = i;
    fill(own + 1, own + n + 1, 0);
    
    for (int x : keys[i]) {
      own[x] = 1;
    }
    
    bool did = 1;
    
    while (did) {
      did = 0;
    
      if (L > 1 && own[betw[L - 1]]) {
        --L;
        
        for (int x : keys[L]) {
          own[x] = 1;
        }
        
        did = 1;
      }
      
      if (R < n && own[betw[R]]) {
        ++R;
        
        for (int x : keys[R]) {
          own[x] = 1;
        }
        
        did = 1;
      }
    }
    
    seg[i] = mp(L, R);
  }
  
  scanf("%d", &q);
  
  for (int i = 1; i <= q; ++i) {
    int a, b;
    scanf("%d %d", &a, &b);
    
    if (seg[a].fi <= b && b <= seg[a].se) {
      printf("YES\n");
    }
    else {
      printf("NO\n");
    }
  }
}

int main() {
  int tt = 1;
  
  while (tt--) {
    solve();
  }

  return 0;
}

Compilation message (stderr)

long_mansion.cpp: In function 'void solve()':
long_mansion.cpp:26:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   26 |   scanf("%d", &n);
      |   ~~~~~^~~~~~~~~~
long_mansion.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   29 |     scanf("%d", &betw[i]);
      |     ~~~~~^~~~~~~~~~~~~~~~
long_mansion.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |     scanf("%d", &sz);
      |     ~~~~~^~~~~~~~~~~
long_mansion.cpp:38:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |       scanf("%d", &keys[i][j]);
      |       ~~~~~^~~~~~~~~~~~~~~~~~~
long_mansion.cpp:79:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   79 |   scanf("%d", &q);
      |   ~~~~~^~~~~~~~~~
long_mansion.cpp:83:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   83 |     scanf("%d %d", &a, &b);
      |     ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 0 / 15
• Subtask 4: 0 / 75