oj.uz

Submission #345351

# Submission time Handle Problem Language Result Execution time Memory
345351 2021-01-07T07:53:26 Z maskoff Marriage questions (IZhO14_marriage) C++14
72 / 100
 1500 ms 25324 KB 
#include <bits/stdc++.h>

#define file ""

#define all(x) x.begin(), x.end()

#define sc second
#define fr first

#define pb push_back
#define mp make_pair

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

const ll inf = 1e18 + 5;
const ll mod = 1e9 + 7;

const int N = 5e5 + 5;

int dx[] = {+1, 0, -1, 0};
int dy[] = {0, +1, 0, -1};


int n, m, k, timer;
int used[N], mt[N], pr[N], s[N];
vector<int> g[N], all[N];

bool go(int v) {
	if (used[v] == timer) return false;
	used[v] = timer;

 	for (int i = s[v]; i < g[v].size(); i++) {
  	int to = g[v][i];
 		if (mt[to] == false) {
 		 	mt[to] = v;
 		 	pr[v] = to;
 		 	return true;
 		}
 	}
 	  
 	for (int i = s[v]; i < g[v].size(); i++) {
 		int to = g[v][i];
		if (go(mt[to])) {
		 	mt[to] = v;
		 	pr[v] = to;
		 	return true;
		}
	}

	return false;
}

bool check(int y, int p) {
	fill (pr + 1, pr + 1 + m, false);

	for (int j : all[p])
		g[j].pb(p);
	
	for (int i = 1; i <= m; i++) {
		timer++;
		go(i);
	}
	
	int ok = true;
	for (int i = 1; i <= m; i++) 
		if (pr[i] == 0) ok = false;
		else mt[pr[i]] = false;
	
	return ok;
}

void clear(int x) {
 	for (int j : all[x]) 
 		s[j]++;
}                   

int main() {   
	ios_base :: sync_with_stdio(false);               
	cin.tie(nullptr);
	srand(time(nullptr));
	cin >> n >> m >> k;
	for (int x, y, i = 1; i <= k; i++) {
		cin >> x >> y;
	 	all[x].pb(y);
	}
	ll res = 0;
	int j = 1;
	for (int i = 1; i <= n; i++) {
		int p = check(i, j);
		while (j <= n && !p) {
			j++;
			if (j == n + 1) break;
			p = check(i, j);
	 	}
	 	if (p) res += n - j + 1;
	 	else break;
	 	clear(i);
	}
	cout << res;
  return 0;              
}

Compilation message

marriage.cpp: In function 'bool go(int)':
marriage.cpp:35:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |   for (int i = s[v]; i < g[v].size(); i++) {
      |                      ~~^~~~~~~~~~~~~
marriage.cpp:44:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |   for (int i = s[v]; i < g[v].size(); i++) {
      |                      ~~^~~~~~~~~~~~~

Subtask #1
72.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 17 ms 23904 KB Output isn't correct
2 Correct 23 ms 23788 KB Output is correct
3 Correct 17 ms 23904 KB Output is correct
4 Correct 16 ms 23788 KB Output is correct
5 Correct 19 ms 23856 KB Output is correct
6 Correct 18 ms 23788 KB Output is correct
7 Incorrect 16 ms 23788 KB Output isn't correct
8 Correct 18 ms 23788 KB Output is correct
9 Correct 19 ms 23936 KB Output is correct
10 Correct 19 ms 23788 KB Output is correct
11 Correct 18 ms 23872 KB Output is correct
12 Correct 17 ms 23788 KB Output is correct
13 Incorrect 19 ms 23788 KB Output isn't correct
14 Correct 15 ms 23788 KB Output is correct
15 Incorrect 15 ms 23788 KB Output isn't correct
16 Correct 17 ms 23876 KB Output is correct
17 Correct 17 ms 23788 KB Output is correct
18 Correct 17 ms 23788 KB Output is correct
19 Incorrect 35 ms 23916 KB Output isn't correct
20 Incorrect 20 ms 23916 KB Output isn't correct
21 Correct 17 ms 23788 KB Output is correct
22 Correct 17 ms 23908 KB Output is correct
23 Correct 20 ms 23916 KB Output is correct
24 Correct 19 ms 23916 KB Output is correct
25 Incorrect 58 ms 24044 KB Output isn't correct
26 Incorrect 30 ms 23916 KB Output isn't correct
27 Correct 18 ms 23916 KB Output is correct
28 Correct 17 ms 23916 KB Output is correct
29 Correct 32 ms 23916 KB Output is correct
30 Correct 23 ms 23916 KB Output is correct
31 Execution timed out 1562 ms 24284 KB Time limit exceeded
32 Correct 416 ms 23916 KB Output is correct
33 Correct 28 ms 23936 KB Output is correct
34 Correct 30 ms 23916 KB Output is correct
35 Correct 228 ms 25100 KB Output is correct
36 Correct 195 ms 25068 KB Output is correct
37 Execution timed out 1572 ms 24304 KB Time limit exceeded
38 Correct 74 ms 25288 KB Output is correct
39 Correct 583 ms 24172 KB Output is correct
40 Correct 471 ms 24164 KB Output is correct
41 Correct 719 ms 24488 KB Output is correct
42 Correct 185 ms 24440 KB Output is correct
43 Correct 207 ms 24684 KB Output is correct
44 Correct 382 ms 25068 KB Output is correct
45 Execution timed out 1586 ms 24940 KB Time limit exceeded
46 Execution timed out 1562 ms 25076 KB Time limit exceeded
47 Correct 731 ms 25324 KB Output is correct
48 Correct 724 ms 25320 KB Output is correct
49 Execution timed out 1566 ms 25068 KB Time limit exceeded
50 Execution timed out 1584 ms 24288 KB Time limit exceeded