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Submission #284331

# Submission time Handle Problem Language Result Execution time Memory
284331 2020-08-27T08:50:38 Z 임성재(#5754) Aesthetic (NOI20_aesthetic) C++17
0 / 100
 393 ms 39068 KB 
#include<bits/stdc++.h>
using namespace std;

#define fast ios::sync_with_stdio(false); cin.tie(0);
#define fi first
#define se second
#define em emplace
#define eb emplace_back
#define mp make_pair
#define all(v) (v).begin(), (v).end()

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<ll, pll> plll;
const int inf = 1e9;
const ll INF = 1e18;

int n, m;
int u[300010];
int v[300010];
ll w[300010];
ll a[300010];
vector<pll> g[300010];
int dp[300010];
int d[300010];
bool chk[300010];
int ans = inf;

void dfs(int x, int p) {
	chk[x] = true;
	dp[x] = d[x];

	for(auto i : g[x]) {
		if(i.se == p) continue;
		if(chk[i.fi]) {
			dp[x] = min(dp[x], d[i.fi]);

			continue;
		}

		d[i.fi] = d[x] + 1;

		dfs(i.fi, i.se);

		dp[x] = min(dp[x], dp[i.fi]);
	}

	if(p && dp[x] >= d[x]) {
		ans = min(ans, p);
	}
} 

int main() {
	fast;

	cin >> n >> m;

	for(int i=1; i<=m; i++) {
		cin >> u[i] >> v[i] >> w[i];

		g[u[i]].eb(v[i], i);
		g[v[i]].eb(u[i], i);
	}

	for(int i=m; i > 1; i--) {
		a[i-1] = max(a[i], w[i]);
	}

	dfs(1, 0);

	memset(chk, 0, sizeof(chk));
	queue<int> q;
	q.em(1);
	chk[1] = true;

	while(q.size()) {
		int x = q.front();
		q.pop();

		for(auto i : g[x]) {
			if(chk[i.fi]) continue;
				
			chk[i.fi] = true;
			d[i.fi] = d[x] + 1;
			q.em(i.fi);
		}
	}

	cout << d[n] + (ans < m ? 1 : 0);
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 7680 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 7680 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 380 ms 33272 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 393 ms 33740 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 357 ms 39068 KB Output is correct
2 Incorrect 160 ms 30840 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 357 ms 39068 KB Output is correct
2 Incorrect 160 ms 30840 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 7680 KB Output isn't correct
2 Halted 0 ms 0 KB -