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Submission #335413

# Submission time Handle Problem Language Result Execution time Memory
335413 2020-12-12T15:12:12 Z Benq Sirni (COCI17_sirni) C++14
140 / 140
 2430 ms 616112 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
using ll = long long;
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ii pair<int, int>
 
int pa[100000], sz[100000];
vector<ii> edges[(int)1e7+10];
int idx[(int)1e7+10];
int number[(int)1e7+10];
int findSet(int x) {
    return pa[x] == x ? x : pa[x] = findSet(pa[x]);
}
void unite(int a, int b) {
    a = findSet(a); b = findSet(b);
    if (sz[a] > sz[b]) swap(a, b);
    pa[a] = b;
    sz[b] += sz[a];
}
 
int main() {
    cin.tie(0); ios_base::sync_with_stdio(false);
    int n; cin >> n;
 
    set<int> nums;
    for (int i = 0; i < n; i++) {
        int p; cin >> p;
        nums.insert(p);
    }
    int ctr = 0;
    for (int num : nums) {
        idx[num] = ctr++;
    }
    for (int i = 0; i < n; i++) {
        sz[i] = 1;
        pa[i] = i;
    }
    auto it = nums.begin();
    for (int i = 0; i <= 1e7; i++) {
        while (it != nums.end() && *it < i) it++;
        if (it == nums.end()) number[i] = -1;
        else number[i] = *it;
    }
 
    for (int num : nums) {
        int prev = -1;
        for (int i = num; i <= 1e7; i += num) {
            int it = i == num ? number[i+1] : number[i];
            if (it != -1) {
                if (prev == it) continue;
                prev = it;
                edges[it%num].emplace_back(idx[num], idx[it]);
            } else {
                break;
            }
        }
        /*
        for (int num2 : nums) {
            if (num < num2)
                edges.pb(mp(num2%num, mp(idx[num], idx[num2])));
        }
        */
    }
 
    ll ans = 0;
    for (int c = 0; c <= 1e7; c++) {
        for (auto e : edges[c]) {
            if (findSet(e.f) != findSet(e.s)) {
                ans += c;
                unite(e.f, e.s);
            }
        }
    }
    cout << ans << endl;
 
    return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 236 ms 278324 KB Output is correct
2 Correct 270 ms 279020 KB Output is correct
3 Correct 220 ms 278636 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 229 ms 274540 KB Output is correct
2 Correct 548 ms 275564 KB Output is correct
3 Correct 251 ms 278636 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 218 ms 278508 KB Output is correct
2 Correct 217 ms 276836 KB Output is correct
3 Correct 238 ms 278668 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 362 ms 293028 KB Output is correct
2 Correct 565 ms 319808 KB Output is correct
3 Correct 358 ms 297300 KB Output is correct

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 251 ms 280684 KB Output is correct
2 Correct 372 ms 300652 KB Output is correct
3 Correct 351 ms 290600 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 419 ms 305028 KB Output is correct
2 Correct 538 ms 334836 KB Output is correct
3 Correct 373 ms 296400 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 258 ms 280400 KB Output is correct
2 Correct 509 ms 328656 KB Output is correct
3 Correct 361 ms 295516 KB Output is correct

Subtask #8
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 414 ms 330988 KB Output is correct
2 Correct 1688 ms 527244 KB Output is correct
3 Correct 430 ms 333416 KB Output is correct

Subtask #9
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 415 ms 330688 KB Output is correct
2 Correct 2430 ms 616112 KB Output is correct
3 Correct 474 ms 336864 KB Output is correct

Subtask #10
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 260 ms 311788 KB Output is correct
2 Correct 2394 ms 604496 KB Output is correct
3 Correct 364 ms 297436 KB Output is correct