Submission #77625

#	Time	Username	Problem	Language	Result	Execution time	Memory
77625		Just_Solve_The_Problem	Werewolf (IOI18_werewolf)	C++11	15 / 100	341 ms	20516 KiB

werewolf

#include <bits/stdc++.h>
#include "werewolf.h"
// #include "grader.cpp"

#define pb push_back

using namespace std;

const int N = 6e3 + 7;

int was[N];
int used[N];
vector < int > gr[N];
int l, r;
int n;
       
void dfs1(int v, int pr) {
	was[v]++;
	used[v] = 1;
	for (int to : gr[v]) {
		if (!used[to] && to >= l) dfs1(to, v);
	}
}

void dfs2(int v, int pr) {
	was[v]++;
	used[v] = 1;
	for (int to : gr[v]) {
		if (!used[to] && to <= r) dfs2(to, v);
	}
}  

vector < int > check_validity(int N, vector < int > X, vector < int > Y, vector < int > S, vector < int > E, vector < int > L, vector < int > R) {
	n = N;
	for (int i = 0; i < (int)X.size(); i++) {
		gr[X[i]].pb(Y[i]);
		gr[Y[i]].pb(X[i]);
	}
	vector < int > ans;
	int q = S.size();
	for (int i = 0; i < q; i++) {
		l = L[i];
		r = R[i];
		memset(was, 0, sizeof was);
		dfs1(S[i], S[i]);
		memset(used, 0, sizeof used);
		dfs2(E[i], E[i]);
		memset(used, 0, sizeof used);
		int ok = 1;
		for (int j = l; j <= r; j++) {
			if (was[j] == 2) {
				ans.pb(1);
				ok = 0;
				break;
			}
		}
		if (ok) {
			ans.pb(0);
		}
	}
	return ans;
}

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 0 / 34
• Subtask 4: 0 / 51