oj.uz

Submission #363283

# Submission time Handle Problem Language Result Execution time Memory
363283 2021-02-05T12:28:15 Z SamAnd Marriage questions (IZhO14_marriage) C++17
18 / 100
 1500 ms 1684 KB 
#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const int N = 30004, M = 2003;

int n, m, k;
vector<int> g[M];

int u[N];
int uu[M];
bool c[M];
bool dfs(int x, int l, int r)
{
    if (c[x])
        return false;
    c[x] = true;
    for (int i = 0; i < g[x].size(); ++i)
    {
        int h = g[x][i];
        if (!(l <= h && h <= r))
            continue;
        if (u[h] == 0)
        {
            u[h] = x;
            uu[x] = h;
            return true;
        }
        else
        {
            if (dfs(u[h], l, r))
            {
                u[h] = x;
                uu[x] = h;
                return true;
            }
        }
    }
    return false;
}

void solv()
{
    scanf("%d%d%d", &n, &m, &k);
    for (int i = 0; i < k; ++i)
    {
        int x, y;
        scanf("%d%d", &x, &y);
        g[y].push_back(x);
    }

    int ans = 0;
    int r = 0;
    for (int l = 1; l <= n; ++l)
    {
        memset(u, 0, sizeof u);
        memset(uu, 0, sizeof uu);
        while (1)
        {
            int i = 1;
            while (1)
            {
                if (i == m + 1)
                    break;
                memset(c, false, sizeof c);
                if (dfs(i, l, r))
                {
                    ++i;
                    continue;
                }
                break;
            }
            if (i == m + 1)
                break;
            ++r;
            if (r == n + 1)
                break;
        }
        if (r == n + 1)
            break;
        ans += (n - r + 1);
    }
    printf("%d\n", ans);
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    //ios_base::sync_with_stdio(false), cin.tie(0);
    solv();
    return 0;
}

Compilation message

marriage.cpp: In function 'bool dfs(int, int, int)':
marriage.cpp:24:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for (int i = 0; i < g[x].size(); ++i)
      |                     ~~^~~~~~~~~~~~~
marriage.cpp: In function 'void solv()':
marriage.cpp:50:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   50 |     scanf("%d%d%d", &n, &m, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
marriage.cpp:54:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   54 |         scanf("%d%d", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
18.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 492 KB Output isn't correct
2 Incorrect 1 ms 492 KB Output isn't correct
3 Incorrect 1 ms 492 KB Output isn't correct
4 Incorrect 1 ms 492 KB Output isn't correct
5 Incorrect 1 ms 492 KB Output isn't correct
6 Incorrect 1 ms 492 KB Output isn't correct
7 Incorrect 1 ms 492 KB Output isn't correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Incorrect 1 ms 492 KB Output isn't correct
12 Correct 1 ms 492 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Incorrect 1 ms 492 KB Output isn't correct
15 Incorrect 1 ms 492 KB Output isn't correct
16 Incorrect 1 ms 492 KB Output isn't correct
17 Incorrect 1 ms 492 KB Output isn't correct
18 Incorrect 1 ms 492 KB Output isn't correct
19 Incorrect 1 ms 492 KB Output isn't correct
20 Incorrect 1 ms 492 KB Output isn't correct
21 Correct 1 ms 492 KB Output is correct
22 Incorrect 1 ms 512 KB Output isn't correct
23 Incorrect 1 ms 492 KB Output isn't correct
24 Incorrect 1 ms 492 KB Output isn't correct
25 Incorrect 6 ms 620 KB Output isn't correct
26 Incorrect 2 ms 492 KB Output isn't correct
27 Correct 1 ms 492 KB Output is correct
28 Incorrect 1 ms 492 KB Output isn't correct
29 Incorrect 3 ms 620 KB Output isn't correct
30 Incorrect 3 ms 620 KB Output isn't correct
31 Incorrect 17 ms 1132 KB Output isn't correct
32 Incorrect 10 ms 620 KB Output isn't correct
33 Correct 1 ms 492 KB Output is correct
34 Incorrect 1 ms 492 KB Output isn't correct
35 Incorrect 21 ms 1516 KB Output isn't correct
36 Incorrect 18 ms 1516 KB Output isn't correct
37 Incorrect 29 ms 1260 KB Output isn't correct
38 Incorrect 27 ms 1536 KB Output isn't correct
39 Incorrect 3 ms 620 KB Output isn't correct
40 Correct 4 ms 748 KB Output is correct
41 Incorrect 7 ms 876 KB Output isn't correct
42 Incorrect 10 ms 876 KB Output isn't correct
43 Incorrect 15 ms 1260 KB Output isn't correct
44 Incorrect 24 ms 1516 KB Output isn't correct
45 Execution timed out 1572 ms 1004 KB Time limit exceeded
46 Execution timed out 1576 ms 1644 KB Time limit exceeded
47 Incorrect 32 ms 1516 KB Output isn't correct
48 Incorrect 27 ms 1516 KB Output isn't correct
49 Execution timed out 1571 ms 1684 KB Time limit exceeded
50 Incorrect 5 ms 664 KB Output isn't correct