제출 #977301

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
977301		steveonalex	통행료 (APIO13_toll)	C++17	16 / 100	1 ms	348 KiB

toll

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

#define ALL(v) (v).begin(), (v).end()
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)

// mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng(1);
ll rngesus(ll l, ll r){return ((ull) rng()) % (r - l + 1) + l;}

ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}

ll LASTBIT(ll mask){return mask & (-mask);}
ll pop_cnt(ll mask){return __builtin_popcountll(mask);}
ll ctz(ll mask){return __builtin_ctzll(mask);}
ll clz(ll mask){return __builtin_clzll(mask);}
ll logOf(ll mask){return 63 - clz(mask);}

template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b){a = b; return true;}
        return false;
    }
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b){a = b; return true;}
        return false;
    }
template <class T>
    void printArr(T a, string separator = " ", string finish = "\n", ostream& out = cout){
        for(auto i: a) out << i << separator;
        out << finish;
    }
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

const int N = 1e5 + 69;

int n, m, k; 
int p[N];

struct DSU{
    int n;
    vector<int> parent;
    vector<ll> sz;

    DSU(int _n){
        n = _n;
        parent.resize(n+1); sz.resize(n+1, 1);
        for(int i = 0; i<=n; ++i) parent[i] = i;
    }

    int find_set(int u){return (u == parent[u]) ? u : (parent[u] = find_set(parent[u]));}
    bool same_set(int u, int v){return find_set(u) == find_set(v);}
    bool join_set(int u, int v){
        u = find_set(u), v = find_set(v);
        if (u != v){
            if (sz[u] < sz[v]) swap(u, v);
            parent[v] = u;
            sz[u] += sz[v];
            return true;
        }
        return false;
    }

    ll get_sz(int u){return sz[find_set(u)];}
};

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> m >> k;
    vector<array<int, 3>> path(m);
    for(int i= 0; i<m; ++i) for(int j = 0; j<3; ++j) cin >> path[i][j];

    int u, v; cin >> u >> v;

    sort(ALL(path), [](array<int, 3> a, array<int, 3> b){
        return a[2] < b[2];
    });

    DSU mst(n);
    for(int i = 1; i<=n; ++i) cin >> mst.sz[i];

    int peak_w = 1e9 + 69;
    for(array<int, 3> i: path) {
        u = mst.find_set(u), v = mst.find_set(v);
        int _u = mst.find_set(i[0]), _v= mst.find_set(i[1]);
        if (u > v) swap(u, v);
        if (_u > _v) swap(_u, _v);
        if (u == _u && v == _v) {  
            minimize(peak_w, i[2]);
        }
        else mst.join_set(i[0], i[1]);
    }

    ll ans;
    if (mst.same_set(u, 1)) {
        ans = 1LL * peak_w * mst.get_sz(v);
    }
    else {
        ans = 1LL * peak_w * mst.get_sz(u);
    }

    cout << ans << "\n";



    return 0;
}

• Subtask 1: 16 / 16
• Subtask 2: 0 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 22
• Subtask 5: 0 / 22