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Submission #95471

# Submission time Handle Problem Language Result Execution time Memory
95471 2019-02-01T13:16:33 Z choikiwon Marriage questions (IZhO14_marriage) C++17
68 / 100
 203 ms 4600 KB 
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;

const int MN = 100010;

int N, M, K;
vector<int> adj[MN];
int vis[MN], who[MN], timer;
vector<int> rem;

bool dfs(int u, int l, int r) {
    if(vis[u] == timer) return false;
    vis[u] = timer;

    for(int i = 0; i < adj[u].size(); i++) {
        int v = adj[u][i];
        if(v < l || r < v) continue;

        if(who[v] == -1 || dfs(who[v], l, r)) {
            who[v] = u;
            return true;
        }
    }
    return false;
}

int main() {
    scanf("%d %d %d", &N, &M, &K);

    for(int i = 0; i < K; i++) {
        int a, b; scanf("%d %d", &a, &b);
        a--; b--;

        adj[b].push_back(a);
    }
    memset(who, -1, sizeof(who));

    for(int i = 0; i < M; i++) rem.push_back(i);
    ll ans = 0;
    int j = 0;
    for(int i = 0; i < N; i++) {
        while(j < N && rem.size()) {
            while(rem.size()) {
                int t = rem.back(); rem.pop_back();

                timer++;
                if(!dfs(t, i, j)) {
                    rem.push_back(t);
                    break;
                }
            }
            j++;
        }
        if(rem.size()) break;
        ans += N - j + 1;

        if(who[i] != -1) {
            rem.push_back(who[i]);
        }
    }
    printf("%lld", ans);
}

Compilation message

marriage.cpp: In function 'bool dfs(int, int, int)':
marriage.cpp:17:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < adj[u].size(); i++) {
                    ~~^~~~~~~~~~~~~~~
marriage.cpp: In function 'int main()':
marriage.cpp:30:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d", &N, &M, &K);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
marriage.cpp:33:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         int a, b; scanf("%d %d", &a, &b);
                   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
68.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 3064 KB Output isn't correct
2 Incorrect 4 ms 3064 KB Output isn't correct
3 Correct 4 ms 2936 KB Output is correct
4 Correct 4 ms 3064 KB Output is correct
5 Correct 2 ms 3064 KB Output is correct
6 Correct 4 ms 3064 KB Output is correct
7 Correct 4 ms 3064 KB Output is correct
8 Correct 3 ms 3064 KB Output is correct
9 Correct 3 ms 3064 KB Output is correct
10 Correct 4 ms 3064 KB Output is correct
11 Correct 3 ms 3064 KB Output is correct
12 Correct 3 ms 3064 KB Output is correct
13 Correct 3 ms 3064 KB Output is correct
14 Correct 3 ms 3064 KB Output is correct
15 Correct 4 ms 2980 KB Output is correct
16 Correct 4 ms 3064 KB Output is correct
17 Correct 4 ms 3064 KB Output is correct
18 Correct 4 ms 3068 KB Output is correct
19 Correct 4 ms 3144 KB Output is correct
20 Correct 4 ms 3064 KB Output is correct
21 Correct 4 ms 3064 KB Output is correct
22 Correct 4 ms 3064 KB Output is correct
23 Correct 5 ms 3064 KB Output is correct
24 Correct 4 ms 3064 KB Output is correct
25 Correct 10 ms 3192 KB Output is correct
26 Incorrect 5 ms 3064 KB Output isn't correct
27 Correct 4 ms 3064 KB Output is correct
28 Correct 4 ms 3064 KB Output is correct
29 Incorrect 6 ms 3192 KB Output isn't correct
30 Incorrect 5 ms 3192 KB Output isn't correct
31 Correct 89 ms 3816 KB Output is correct
32 Incorrect 5 ms 3064 KB Output isn't correct
33 Correct 4 ms 3064 KB Output is correct
34 Correct 5 ms 3064 KB Output is correct
35 Correct 48 ms 4344 KB Output is correct
36 Correct 37 ms 4216 KB Output is correct
37 Correct 186 ms 3836 KB Output is correct
38 Incorrect 23 ms 4344 KB Output isn't correct
39 Correct 75 ms 3280 KB Output is correct
40 Correct 7 ms 3312 KB Output is correct
41 Incorrect 9 ms 3448 KB Output isn't correct
42 Incorrect 10 ms 3448 KB Output isn't correct
43 Incorrect 15 ms 3832 KB Output isn't correct
44 Incorrect 22 ms 4472 KB Output isn't correct
45 Incorrect 12 ms 3576 KB Output isn't correct
46 Incorrect 29 ms 4600 KB Output isn't correct
47 Incorrect 25 ms 4600 KB Output isn't correct
48 Incorrect 23 ms 4472 KB Output isn't correct
49 Incorrect 32 ms 4600 KB Output isn't correct
50 Correct 203 ms 3192 KB Output is correct