Submission #1274080

#	Time	Username	Problem	Language	Result	Execution time	Memory
1274080		g4yuhg	Crocodile's Underground City (IOI11_crocodile)	C++20	Compilation error	0 ms	0 KiB

crocodile

#include"crocodile.h"
#include<bits/stdc++.h>
typedef long long ll;
#define endl '\n'
#define fi first
#define se second
#define pii pair<ll, ll>
#define N 500005
using namespace std;

const ll inf = 1e18;

ll n, m, k, ans;
bool is[N];

ll d[N][2];

vector<pii> adj[N];

void dij() {
	priority_queue<pii, vector<pii>, greater<pii>> pq;
	for (int i = 1; i <= n; i ++) {
		for (int j = 0; j < 2; j ++) {
			d[i][j] = inf;
		}
	}
	for (int i = 1; i <= n; i ++) {
		if (is[i] == 0) continue;
		d[i][1] = 0;
		d[i][0] = 0;
		pq.push({d[i][1], i});
	}
	while (pq.size()) {
		auto c = pq.top().fi;
		auto u = pq.top().se;
		//cout << c << " " << u - 1 << endl;
		pq.pop();
		if (c > d[u][1]) continue;
		for (auto v : adj[u]) {
			ll cost = c + v.se;
			ll mx0 = d[v.fi][0], mx1 = d[v.fi][1];
			if (cost <= mx0) {
				mx1 = mx0;
				mx0 = cost;
			}
			else if (cost < mx1) {
				mx1 = cost;
			}
			if (mx1 < d[v.fi][1]) {
				d[v.fi][1] = mx1;
				pq.push({d[v.fi][1], v.fi});
			}
			d[v.fi][0] = min(d[v.fi][0], mx0);
			d[v.fi][1] = min(d[v.fi][1], mx1);
		}
	}
}

void solve() {
	ans = inf;
	dij();
	ans = d[1][1];
	//cout << ans << endl;
}

void lam() {
	cin >> n >> m >> k;
	for (int i = 1; i <= m; i ++) {
		ll u, v, w;
		cin >> u >> v >> w;
		u ++ ; v ++ ;
		adj[u].push_back({v, w});
		adj[v].push_back({u, w});
	}
	for (int i = 1; i <= k; i ++) {
		ll u; cin >> u;
		u ++ ;
		is[u] = 1;
	}
	solve();
}

ll travel_plan(ll nn, ll mm, ll R[][2], ll L[], ll kk, ll P[]) {
	n = nn;
	m = mm;
	k = kk;
	for (int i = 0; i < mm; i ++) {
		ll u = R[i][0], v = R[i][1], w = L[i];
		u ++ ;
		v ++ ;
		adj[u].push_back({v, w});
		adj[v].push_back({u, w});
	}
	for (int i = 0; i < kk; i ++) {
		ll u = P[i] + 1;
		is[u] = 1;
	}
	ans = inf;
	solve();
	return ans;
}

signed main() {
	ios_base::sync_with_stdio(0); cin.tie(0);
	cout.tie(0);
	
	//lam();
	
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cco14KuE.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccQmkzol.o:crocodile.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cco14KuE.o: in function `main':
grader.cpp:(.text.startup+0x36): undefined reference to `travel_plan(int, int, int (*) [2], int*, int, int*)'
collect2: error: ld returned 1 exit status