Submission #696381

#	Time	Username	Problem	Language	Result	Execution time	Memory
696381		youngyojun	Bread First Search (CCO21_day2problem2)	C++17	0 / 25	2 ms	328 KiB

Main

#include <bits/stdc++.h>
#define upmin(a,b) (a)=(min((a),(b)))
#define INF (0x3f3f3f3f)
using namespace std;

const int MAXN = 5'005;

int D[MAXN], L[MAXN];

int A[MAXN];

int N;

int main() {
	ios_base::sync_with_stdio(0); cin.tie(0);

{
	int M;
	cin >> N >> M;
	fill_n(A, N+2, INF);
	while(M--) {
		int a, b; cin >> a >> b;
		if(a > b) swap(a, b);
		upmin(A[b], a);
	}
}

	L[N+1] = N;
	for(int i = N; i; i--) L[i] = min({L[i+1], A[i], i-1});

	for(int i = N; i; i--) {
		int r = 0;
		for(int j = N+1; i < j; j--) if(i <= L[j]) {
			int t = D[j];
			for(int v = N; j <= v; v--)
				if(A[v] < j) t++;
			if(r < t) r = t;
		}
		D[i] = r;
	}

	cout << N-1 - D[1] << '\n';

	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 6
• Subtask 3: 0 / 14