oj.uz

Submission #92775

# Submission time Handle Problem Language Result Execution time Memory
92775 2019-01-04T13:26:01 Z SamAnd Marriage questions (IZhO14_marriage) C++17
48 / 100
 1500 ms 33784 KB 
#pragma comment(linker,"/STACK:200000000")
#define _CRT_SECURE_NO_WARNINGS
#define mp make_pair
#include <iostream>
#include <algorithm>
#include <cstdio>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <list>
#include <stack>
#include <string>
#include <cstring>
void fp();
void sp();
using namespace std;
const int N = 2003;
struct ban
{
	int x, d;
};

int n1, n2, m;
int n;
int ans;
vector<int> a[N];
int b[N][N];
int p[N];
bool c[N];
bool dfs(int x, int pp)
{
	c[x] = true;
	p[x] = pp;
	if (x == n)
		return true;
	for (int i = 0; i <= n; ++i)
	{
		if (!c[i] && b[x][i])
		{
			if (dfs(i, x))
				return true;
		}
	}
	return false;
}
bool stg(int l, int r)
{
	for (int i = 0; i <= n; ++i)
	{
		for (int j = 0; j <= n; ++j)
		{
			b[i][j] = 0;
		}
	}
	for (int i = l; i <= r; ++i)
	{
		b[0][i] = 1;
		for (int j = 0; j<a[i].size(); ++j)
		{
			b[i][a[i][j]] = 1;
		}
	}
	for (int i = n1 + 1; i<n; ++i)
	{
		b[i][n] = 1;
	}
	for (int i = 0; i <= n; ++i)
		c[i] = false;
	while (dfs(0, -1))
	{
		int minu = N;
		for (int x = n; x != 0; x = p[x])
		{
			minu = min(minu, b[p[x]][x]);
		}
		for (int x = n; x != 0; x = p[x])
		{
			b[p[x]][x] -= minu;
			b[x][p[x]] += minu;
		}
		for (int i = 0; i <= n; ++i)
			c[i] = false;
	}
	int res = 0;
	for (int i = 0; i <= n; ++i)
	{
		res += b[n][i];
	}
	return res == (n2);
}
int main()
{
	ios_base::sync_with_stdio(false);
	//fp();
	cin >> n1 >> n2 >> m;
	n = n1 + n2 + 1;
	for (int i = 0; i<m; ++i)
	{
		int x, y;
		cin >> x >> y;
		a[x].push_back(y + n1);
	}
	if (n2 == 1)
	{
		for (int l = 1; l <= n1; ++l)
		{
			for (int r = l; r <= n1; ++r)
			{
				if ((r - l + 1)<n2)
					continue;
				if (stg(l, r))
				{
					++ans;
				}
			}
		}
	}
	else
	{
		for (int l = 1; l <= n1; ++l)
		{
			for (int r = l + 1; r <= n1; ++r)
			{
				if ((r - l + 1)<n2)
					continue;
				if (stg(l, r))
				{
					++ans;
				}
			}
		}
	}
	cout << ans << endl;
	sp();
	return 0;
}

void fp()
{
#ifndef OLYMP
	freopen("marriage.in", "r", stdin);
	freopen("marriage.out", "w", stdout);
#endif
}
void sp()
{
#ifdef OLYMP
	system("pause");
#endif
}

Compilation message

marriage.cpp:1:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker,"/STACK:200000000")
 
marriage.cpp: In function 'bool stg(int, int)':
marriage.cpp:59:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j<a[i].size(); ++j)
                   ~^~~~~~~~~~~~
marriage.cpp: In function 'void fp()':
marriage.cpp:142:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("marriage.in", "r", stdin);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
marriage.cpp:143:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("marriage.out", "w", stdout);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
48.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 508 KB Output is correct
7 Correct 2 ms 504 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 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 526 ms 1180 KB Output is correct
20 Correct 329 ms 1272 KB Output is correct
21 Correct 232 ms 1176 KB Output is correct
22 Correct 406 ms 1272 KB Output is correct
23 Correct 377 ms 1272 KB Output is correct
24 Correct 328 ms 1144 KB Output is correct
25 Execution timed out 1578 ms 4344 KB Time limit exceeded
26 Execution timed out 1580 ms 4216 KB Time limit exceeded
27 Execution timed out 1574 ms 4216 KB Time limit exceeded
28 Execution timed out 1575 ms 4216 KB Time limit exceeded
29 Execution timed out 1575 ms 4344 KB Time limit exceeded
30 Execution timed out 1573 ms 4344 KB Time limit exceeded
31 Execution timed out 1577 ms 12792 KB Time limit exceeded
32 Execution timed out 1564 ms 12408 KB Time limit exceeded
33 Execution timed out 1572 ms 12152 KB Time limit exceeded
34 Execution timed out 1580 ms 12152 KB Time limit exceeded
35 Execution timed out 1563 ms 12920 KB Time limit exceeded
36 Execution timed out 1574 ms 12920 KB Time limit exceeded
37 Runtime error 3 ms 632 KB Execution killed with signal 11 (could be triggered by violating memory limits)
38 Runtime error 49 ms 33784 KB Execution killed with signal 11 (could be triggered by violating memory limits)
39 Runtime error 3 ms 632 KB Execution killed with signal 11 (could be triggered by violating memory limits)
40 Runtime error 3 ms 632 KB Execution killed with signal 11 (could be triggered by violating memory limits)
41 Runtime error 3 ms 632 KB Execution killed with signal 11 (could be triggered by violating memory limits)
42 Runtime error 4 ms 892 KB Execution killed with signal 11 (could be triggered by violating memory limits)
43 Runtime error 4 ms 888 KB Execution killed with signal 11 (could be triggered by violating memory limits)
44 Runtime error 6 ms 1016 KB Execution killed with signal 11 (could be triggered by violating memory limits)
45 Runtime error 3 ms 632 KB Execution killed with signal 11 (could be triggered by violating memory limits)
46 Runtime error 3 ms 632 KB Execution killed with signal 11 (could be triggered by violating memory limits)
47 Runtime error 4 ms 1016 KB Execution killed with signal 11 (could be triggered by violating memory limits)
48 Runtime error 4 ms 760 KB Execution killed with signal 11 (could be triggered by violating memory limits)
49 Runtime error 2 ms 632 KB Execution killed with signal 11 (could be triggered by violating memory limits)
50 Runtime error 2 ms 632 KB Execution killed with signal 11 (could be triggered by violating memory limits)