Submission #402134

#	Time	Username	Problem	Language	Result	Execution time	Memory
402134		AriaH	Long Mansion (JOI17_long_mansion)	C++11	5 / 100	3062 ms	19144 KiB

long_mansion

/** I can do this all day **/

#pragma GCC optimize("O2")
#include <bits/stdc++.h>
using namespace std;

typedef long long                   ll;
typedef long double                 ld;
typedef pair<int,int>               pii;
typedef pair<ll,ll>                 pll;
#define all(x)                      (x).begin(),(x).end()
#define F                           first
#define S                           second
#define Mp                          make_pair
#define SZ(x)			    		(int)x.size()
#define fast_io                     ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io                     freopen("in.txt" , "r+" , stdin) ; freopen("out.txt" , "w+" , stdout);

const int N = 5e5 + 10;
const ll mod = 1e9 + 7;
const ll mod2 = 998244353;
const ll inf = 1e9;
const int LOG = 22;

ll pw(ll a , ll b, ll M)  { return (!b ? 1 : (b & 1 ? (a * pw(a * a % M, b / 2, M)) % M : pw(a * a % M, b / 2, M))); }

int n, q, X[N], Y[N], C[N], Z[N], mark[N];

vector < int > keys[N];

int main()
{
	scanf("%d", &n);
	for(int i = 1; i < n; i ++)
	{
		scanf("%d", &C[i]);
	}
	for(int i = 1; i <= n; i ++)
	{
		scanf("%d", &Z[i]);
		for(int j = 1; j <= Z[i]; j ++)
		{
			int x;
			scanf("%d", &x);
			keys[i].push_back(x);
		}
	}
	scanf("%d", &q);
	for(int i = 1; i <= q; i ++)
	{
		scanf("%d%d", &X[i], &Y[i]);
		memset(mark, 0, sizeof mark);
		int l = X[i], r = X[i];
		for(auto x : keys[X[i]]) mark[x] = 1;
		while(1)
		{
			if(!mark[C[l - 1]] && !mark[C[r]]) break;
			if(mark[C[l - 1]])
			{
			    l --;
			    for(auto x : keys[l]) mark[x] = 1;
			}
			else
			{
			    r ++;
			    for(auto x : keys[r]) mark[x] = 1;
			}
		}
		if(l <= Y[i] && Y[i] <= r)
		{
		    printf("YES\n");
		}
		else
		{
		    printf("NO\n");
		}
	}
	return 0;
}

Compilation message (stderr)

long_mansion.cpp: In function 'int main()':
long_mansion.cpp:33:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
long_mansion.cpp:36:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |   scanf("%d", &C[i]);
      |   ~~~~~^~~~~~~~~~~~~
long_mansion.cpp:40:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |   scanf("%d", &Z[i]);
      |   ~~~~~^~~~~~~~~~~~~
long_mansion.cpp:44:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |    scanf("%d", &x);
      |    ~~~~~^~~~~~~~~~
long_mansion.cpp:48:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |  scanf("%d", &q);
      |  ~~~~~^~~~~~~~~~
long_mansion.cpp:51:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |   scanf("%d%d", &X[i], &Y[i]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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