Submission #104504

#	Time	Username	Problem	Language	Result	Execution time	Memory
104504		dfistric	Crocodile's Underground City (IOI11_crocodile)	C++14	100 / 100	1637 ms	86392 KiB

crocodile

#include <bits/stdc++.h>

#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define ll long long
#define X first
#define Y second

using namespace std;

const int MAXN = 100100;
ll inf = (1LL << 60);
vector <pair <int, ll> > ve[MAXN];
int n, m;
ll A[MAXN], B[MAXN];
set <pair <ll, int> > se;

int travel_plan(int N, int M, int R[][2], int L[], int K, int P[]) {
    n = N, m = M;

    REP(i, m) {
        int a = R[i][0], b = R[i][1];
        ll c = L[i];
        ve[a].push_back({b, c});
        ve[b].push_back({a, c});
    }

    REP(i, n) A[i] = B[i] = inf;
    REP(i, K) A[P[i]] = B[P[i]] = 0;
    REP(i, n) se.insert({B[i], i});

    while (se.size()) {
        auto tr = *se.begin();
        se.erase(se.begin());
        int x = tr.Y;
        for (auto t : ve[x]) {
            int y = t.X;
            ll d = tr.X + t.Y;

            if (d < B[y]) {
                se.erase({B[y], y});
                B[y] = d;
                if (A[y] > B[y]) swap(A[y], B[y]);
                se.insert({B[y], y});
            }
        }
    }


    return B[0];
}

• Subtask 1: 46 / 46
• Subtask 2: 43 / 43
• Subtask 3: 11 / 11