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Submission #128473

# Submission time Handle Problem Language Result Execution time Memory
128473 2019-07-11T01:29:46 Z letrongdat Marriage questions (IZhO14_marriage) C++17
84 / 100
 251 ms 1144 KB 
#include <bits/stdc++.h>
using namespace std;
#define forn(i, a, b)           for(int i=a; i<=b; ++i)
const int maxN = 3e4 +10;
const int maxM = 2e3 +10;
int matched[maxN];
vector<int> E[maxM];
int le, ri, t = 1;
int N, M, K;
long long result;
int visited[maxM];
vector<int> not_match;
bool visit(int u) {
    if (visited[u] == t) return false;
    visited[u] = t;
    while (E[u].size() && E[u].back() < le) E[u].pop_back();
    for(int i=0; i<E[u].size(); ++i) {
        int v = E[u][i];
        if (v <= ri) {
            if (!matched[v] || visit(matched[v])) {
                matched[v] = u;
                return true;
            }
        }    
    }
    return false;
}
int main() {
    ios::sync_with_stdio(0);
    cin >> N >> M >> K;
    forn(i, 1, K) {
        int Ai, Bi; 
        cin >> Ai >> Bi;
        E[Bi].push_back(Ai);
    }
    forn(i, 1, M) {
        sort(E[i].begin(), E[i].end());
        reverse(E[i].begin(), E[i].end());
    }
    forn(i, 1, M) not_match.push_back(i);
    for(le = 1; le <= N; ++le) {
        if (matched[le-1]) {
            not_match.push_back(matched[le-1]);
            matched[le-1] = 0;
        }
        while (ri < N && not_match.size()) {
            ri ++;
            while (not_match.size()) {
                t ++;
                if (visit(not_match.back())) not_match.pop_back(); else break;
            }
        }
        if (not_match.empty()) result += N-ri+1;
    }
    cout << result;
}

Compilation message

marriage.cpp: In function 'bool visit(int)':
marriage.cpp:17:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<E[u].size(); ++i) {
                  ~^~~~~~~~~~~~

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Incorrect 2 ms 376 KB Output isn't correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 6 ms 504 KB Output is correct
26 Incorrect 3 ms 376 KB Output isn't correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 4 ms 380 KB Output is correct
30 Correct 4 ms 376 KB Output is correct
31 Correct 45 ms 632 KB Output is correct
32 Incorrect 4 ms 504 KB Output isn't correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 4 ms 504 KB Output is correct
35 Correct 90 ms 956 KB Output is correct
36 Correct 78 ms 1024 KB Output is correct
37 Correct 85 ms 760 KB Output is correct
38 Correct 27 ms 956 KB Output is correct
39 Correct 86 ms 504 KB Output is correct
40 Correct 6 ms 508 KB Output is correct
41 Incorrect 8 ms 632 KB Output isn't correct
42 Correct 10 ms 632 KB Output is correct
43 Correct 15 ms 760 KB Output is correct
44 Correct 23 ms 1016 KB Output is correct
45 Incorrect 11 ms 764 KB Output isn't correct
46 Incorrect 32 ms 1144 KB Output isn't correct
47 Correct 27 ms 1016 KB Output is correct
48 Correct 24 ms 1016 KB Output is correct
49 Incorrect 33 ms 1144 KB Output isn't correct
50 Correct 251 ms 504 KB Output is correct