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답안 #139914

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
139914 2019-08-01T16:13:48 Z Minnakhmetov Sirni (COCI17_sirni) C++14
98 / 140
 5000 ms 168560 KB 
#include<bits/stdc++.h>
using namespace std;
 
#define ll long long
#define all(aaa) aaa.begin(), aaa.end()
 
const int N = 1e5 + 5, M = 1e7 + 5, INF = 1e9;
int q[N], w[M], nt[M], r_nt[M], c[M];
pair<int, int> mn[N];
bool b[M];
 
int findSet(int v) {
    return q[v] < 0 ? v : q[v] = findSet(q[v]);
}
 
bool connect(int a, int b) {
    a = findSet(a);
    b = findSet(b);
 
    if (a == b)
        return false;
 
    if (q[a] > q[b])
        swap(a, b);
    q[a] += q[b];
    q[b] = a;
 
    return true;
}
 
 
signed main() { 
#ifdef HOME
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    ios_base::sync_with_stdio(0);
    cin.tie(0);
 
    int n;
    cin >> n;
 
    mt19937 rnd(time(0));
    for (int i = 0; i < n; i++) {
        int x;
        cin >> x; 
        b[x] = 1;
    }
 
    fill(w, w + M, -1);
    fill(c, c + M, -1);
    fill(q, q + N, -1);
 
    vector<int> v;
 
    int cnt = 0;

    for (int i = 0; i < M; i++) {
        if (b[i]) {
            w[i] = cnt++;
        }
    }

    int remain = cnt;

    for (int i = 0; i < M; i++) {
        if (b[i]) {
            for (int j = i + i; j < M; j += i) {
                if (b[j] && connect(w[i], w[j])) {
                    remain--;
                }
            }
        }
    }

    for (int i = 0; i < M; i++) {
        if (b[i]) {
            // for (int j = i + i; j < M; j += i) {
            //     b[j] = 0;
            // }
            v.push_back(i);
        }
    }
 
    for (int i = 0; i < v.size(); i++) {
        for (int j = v[i]; j < M; j += v[i]) {
            c[j] = i;
        }
    }
 
 
    nt[M - 1] = INF;
 
    for (int i = M - 2; i >= 0; i--) {
        nt[i] = b[i] ? i : nt[i + 1];
    }
 
    r_nt[0] = -1;
 
    for (int i = 1; i < M; i++) {
        r_nt[i] = c[i] != -1 ? i : r_nt[i - 1];
    }
 
    // for (int i = 0; i < 20; i++) {
    //     cout << nt[i] << " ";
    // }
    // cout << "\n";
    // for (int i = 0; i < 20; i++) {
    //     cout << w[i] << " ";
    // }
    // cout << "\n";

    // for (int x : v)
    //     cout << x << "\n";
    // return 0;

    ll ans = 0;
 
    while (remain > 1) {
        for (int i = 0; i < cnt; i++)
            mn[i] = { INF, -1 };
 
        for (int k = 0; k < v.size(); k++) {
            int x = v[k], cur_set = findSet(k);
 
            for (int i = x; i < M - 1; i += x) {
                int j = x == i ? nt[i + 1] : nt[i];
 
                if (j < i + x) {
                    int oth_set = findSet(w[j]);
                    if (oth_set != cur_set) {
                        mn[cur_set] = min(mn[cur_set], { j - i, oth_set });
                        mn[oth_set] = min(mn[oth_set], { j - i, cur_set });
                    }
                }
            }
 
            if (r_nt[x - 1] != -1) {
                int bef = r_nt[x - 1], oth_set = findSet(c[bef]);
                if (oth_set != cur_set) {
                    mn[cur_set] = min(mn[cur_set], { x - bef, oth_set });
                    mn[oth_set] = min(mn[oth_set], { x - bef, cur_set });
                }
            }
        }
 
        for (int i = 0; i < cnt; i++) {
            // cout << mn[i].first << " " << mn[i].second << "\n";
            if (q[i] < 0 && mn[i].second != -1 && connect(i, mn[i].second))  {
                ans += mn[i].first;
                remain--;
            }
        }
    
    }
 
    cout << ans;
 
 
    return 0;
}

Compilation message

sirni.cpp: In function 'int main()':
sirni.cpp:85:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < v.size(); i++) {
                     ~~^~~~~~~~~~
sirni.cpp:123:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int k = 0; k < v.size(); k++) {
                         ~~^~~~~~~~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 226 ms 160476 KB Output is correct
2 Correct 563 ms 159104 KB Output is correct
3 Correct 225 ms 160604 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 547 ms 157384 KB Output is correct
2 Correct 1084 ms 157812 KB Output is correct
3 Correct 229 ms 160604 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 222 ms 160604 KB Output is correct
2 Correct 233 ms 158476 KB Output is correct
3 Correct 228 ms 160760 KB Output is correct

Subtask #4
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1380 ms 159516 KB Output is correct
2 Correct 3346 ms 159464 KB Output is correct
3 Correct 933 ms 159364 KB Output is correct

Subtask #5
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 410 ms 158528 KB Output is correct
2 Correct 1939 ms 158408 KB Output is correct
3 Correct 1461 ms 158876 KB Output is correct

Subtask #6
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2895 ms 159732 KB Output is correct
2 Correct 2583 ms 159704 KB Output is correct
3 Correct 855 ms 159476 KB Output is correct

Subtask #7
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1226 ms 158072 KB Output is correct
2 Correct 3773 ms 159340 KB Output is correct
3 Correct 864 ms 159476 KB Output is correct

Subtask #8
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1403 ms 168456 KB Output is correct
2 Execution timed out 5070 ms 168560 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #9
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1056 ms 168384 KB Output is correct
2 Execution timed out 5058 ms 168168 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #10
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 459 ms 167496 KB Output is correct
2 Execution timed out 5099 ms 167976 KB Time limit exceeded
3 Halted 0 ms 0 KB -