Submission #667488

#	Time	Username	Problem	Language	Result	Execution time	Memory
667488		tanprodium	Sirni (COCI17_sirni)	C++14	0 / 140	5072 ms	52808 KiB

sirni

#include<bits/stdc++.h>

using namespace std;

using ll = long long;

const int N = 1e5;
const int V = 1e7;

int a[N + 5];
int save[N + 5];
int mind[N + 5];
int id[V + 5];
int par[N + 5];
vector<int> vec[N + 5];
bool flag[N + 5];

int getpar(int u) {
    if (par[u] < 0) return (u);
    else return (par[u]);
}

bool uni(int u, int v) {
    u = getpar(u), v = getpar(v);

    if (u == v) return (false);

    if (par[u] > par[v]) swap(u, v);

    par[u] += par[v];
    for (int x : vec[v]) {
        par[x] = u;
        vec[u].push_back(x);
    }

    return (true);
}

void solve() {
    int n;
    cin >> n;

    vector<int> cpr;

    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        cpr.push_back(a[i]);
    }

    sort(cpr.begin(), cpr.end());
    cpr.resize(unique(cpr.begin(), cpr.end()) - cpr.begin());

    n = (int)cpr.size();

    set<int> s;

    for (int i = 1; i <= n; i++) {
        mind[i] = V + 1;
        a[i] = cpr[i - 1];
        id[a[i]] = i;
        s.insert(a[i]);
    }

    for (int i = 1; i <= n; i++) {
        par[i] = -1;
        vec[i].push_back(i);
    }

    ll ans = 0;

    while (par[getpar(1)] != -n) {
        for (int i = 1; i <= n; i++) {
            flag[i] = false;
            mind[i] = V + 1;
        }

        for (int i = 1; i <= n; i++)
        if (!flag[i]) {
            int p = getpar(i);

            for (int x : vec[p]) {
                s.erase(a[x]);
                flag[x] = true;
            }

            int opposite;

            for (int x : vec[p]) {
                int val = a[x];
                int d = 1;

                while (true) {
                    auto iter = s.lower_bound(val * d);
                    if (iter == s.end()) break;
                    int nval = *iter;
                    int y = id[nval];

                    int dist = nval % val;

                    if (dist < mind[x]) {
                        mind[x] = dist;
                        save[x] = y;
                    }

                    if (dist < mind[y]) {
                        mind[y] = dist;
                        save[y] = x;
                    }

                    d = nval / val + 1;
                }
            }

            for (int x : vec[p])
                s.insert(x);
        }

        for (int i = 1; i <= n; i++) flag[i] = false;

        for (int i = 1; i <= n; i++)
        if (!flag[i]) {
            int p = getpar(i);
            int take = -1;

            for (int x : vec[p]) {
                flag[x] = true;
                if (take == -1) take = x;
                else if (mind[x] < mind[take])
                    take = x;

                flag[x] = true;
            }

            if (uni(take, save[take])) ans += 1ll * mind[take];
        }
    }

    cout << ans;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    solve();
    return 0;
}

Compilation message (stderr)

sirni.cpp: In function 'void solve()':
sirni.cpp:86:17: warning: unused variable 'opposite' [-Wunused-variable]
   86 |             int opposite;
      |                 ^~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14