oj.uz

Submission #90678

# Submission time Handle Problem Language Result Execution time Memory
90678 2018-12-23T13:39:07 Z popovicirobert Marriage questions (IZhO14_marriage) C++14
86 / 100
 1500 ms 4224 KB 
#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
#define ld long double
// 217
// 44

using namespace std;

const int MAXN = 30000;
const int MAXM = 2000;

struct Match {
    vector < vector <int> > g;
    vector <int> vis, l, r;
    vector <bool> mp;
    int n, now;
    int ans;
    inline void init(int _n) {
        n = _n;
        g.resize(n + 1);
        l.resize(n + 1);
        r.resize(n + 1);
        vis.resize(n + 1);
        mp.resize(n + 1);
        ans = now = 0;
    }
    inline void addEdge(int x, int y) {
        g[x].push_back(y);
    }
    inline void delEdge(int x, int y) {
        mp[y] = 1;
        if(l[x] == y) {
            l[x] = r[y] = 0;
            ans--;
        }
    }
    bool match(int nod) {
        for(auto it : g[nod]) {
            if(r[it] == 0 && mp[it] == 0) {
                l[nod] = it;
                r[it] = nod;
                return 1;
            }
        }
        vis[nod] = now;
        for(auto it : g[nod]) {
            if(mp[it] == 0 && vis[r[it]] != now && match(r[it])) {
                l[nod] = it;
                r[it] = nod;
                return 1;
            }
        }
        return 0;
    }
    inline int solve(int m) {
        bool flag = 1;
        int i;
        while(flag && ans < m) {
            flag = 0;
            now++;
            for(i = 1; i <= m; i++) {
                if(l[i] == 0) {
                    flag |= match(i);
                    ans += (l[i] > 0);
                }
            }
        }
        return ans;
    }
}M;

vector <int> g[MAXN + 1];

int main() {
    //ifstream cin("A.in");
    //ofstream cout("A.out");
    int i, n, m, k;
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin >> n >> m >> k;
    for(i = 1; i <= k; i++) {
        int a, b;
        cin >> a >> b;
        g[a].push_back(b);
    }
    M.init(n + m);
    int pos = 1, mx = 0;
    int ans = 0;
    for(i = 1; i <= n; i++) {
        bool ok = 0;
        while(M.solve(m) < m && pos <= n) {
            if(mx < pos) {
                for(auto it : g[pos]) {
                    M.addEdge(it, pos + m);
                }
            }
            mx = max(mx, pos);
            pos++;
            ok = 1;
        }
        pos -= ok;
        if(M.ans == m) {
            ans += n - pos + 1;
        }
        for(auto it : g[i]) {
            M.delEdge(it, i + m);
        }
    }
    cout << ans;
    //cin.close();
    //cout.close();
    return 0;
}

Subtask #1
86.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1016 KB Output is correct
2 Correct 2 ms 1140 KB Output is correct
3 Correct 2 ms 1324 KB Output is correct
4 Correct 2 ms 1324 KB Output is correct
5 Correct 2 ms 1324 KB Output is correct
6 Correct 2 ms 1324 KB Output is correct
7 Correct 2 ms 1324 KB Output is correct
8 Correct 2 ms 1388 KB Output is correct
9 Correct 2 ms 1388 KB Output is correct
10 Correct 3 ms 1388 KB Output is correct
11 Correct 3 ms 1388 KB Output is correct
12 Correct 2 ms 1388 KB Output is correct
13 Correct 2 ms 1388 KB Output is correct
14 Correct 3 ms 1388 KB Output is correct
15 Correct 2 ms 1388 KB Output is correct
16 Correct 2 ms 1388 KB Output is correct
17 Correct 2 ms 1388 KB Output is correct
18 Correct 2 ms 1388 KB Output is correct
19 Correct 5 ms 1388 KB Output is correct
20 Correct 3 ms 1388 KB Output is correct
21 Correct 2 ms 1388 KB Output is correct
22 Correct 2 ms 1388 KB Output is correct
23 Correct 3 ms 1388 KB Output is correct
24 Correct 3 ms 1388 KB Output is correct
25 Correct 36 ms 1532 KB Output is correct
26 Correct 8 ms 1532 KB Output is correct
27 Correct 3 ms 1532 KB Output is correct
28 Correct 3 ms 1532 KB Output is correct
29 Correct 21 ms 1532 KB Output is correct
30 Correct 19 ms 1532 KB Output is correct
31 Correct 423 ms 1960 KB Output is correct
32 Correct 45 ms 1960 KB Output is correct
33 Correct 9 ms 1960 KB Output is correct
34 Correct 15 ms 1960 KB Output is correct
35 Correct 530 ms 2428 KB Output is correct
36 Correct 435 ms 2428 KB Output is correct
37 Correct 1154 ms 2428 KB Output is correct
38 Correct 1151 ms 2684 KB Output is correct
39 Correct 447 ms 2684 KB Output is correct
40 Correct 504 ms 2684 KB Output is correct
41 Correct 703 ms 2684 KB Output is correct
42 Execution timed out 1569 ms 2684 KB Time limit exceeded
43 Execution timed out 1566 ms 2684 KB Time limit exceeded
44 Execution timed out 1570 ms 3068 KB Time limit exceeded
45 Correct 1296 ms 3400 KB Output is correct
46 Execution timed out 1563 ms 4068 KB Time limit exceeded
47 Execution timed out 1570 ms 4068 KB Time limit exceeded
48 Execution timed out 1570 ms 4068 KB Time limit exceeded
49 Execution timed out 1559 ms 4224 KB Time limit exceeded
50 Correct 998 ms 4224 KB Output is correct