oj.uz

Submission #345388

# Submission time Handle Problem Language Result Execution time Memory
345388 2021-01-07T08:27:20 Z maskoff Marriage questions (IZhO14_marriage) C++14
88 / 100
 1500 ms 25440 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 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);
	}
	
	bool ok = true;
	for (int i = 1; i <= m; i++) 
		if (pr[i] == 0) ok = false;
		else mt[pr[i]] = 0;
	
	return ok;
}

bool clear(int x) {
 	for (int j : all[x]) 
 		s[j]++;
 	fill (pr + 1, pr + 1 + m, false);
 	for (int i = 1; i <= m; i++) {
 		timer++;
 		go(i);
 	}
 	bool ok = true;
	for (int i = 1; i <= m; i++) 
		if (pr[i] == 0) ok = false;
		else mt[pr[i]] = 0;
	
	return ok;
}                   

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;
	bool p = check(1);
	for (int i = 1; i <= n; i++) {
		while (j <= n && !p) {
			j++;
			if (j == n + 1) break;
			p = check(j);
	 	}
	 	if (p) res += n - j + 1;
	 	else break;
	 	p = 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
88.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23788 KB Output is correct
2 Correct 16 ms 23788 KB Output is correct
3 Correct 16 ms 23788 KB Output is correct
4 Correct 18 ms 23788 KB Output is correct
5 Correct 16 ms 23788 KB Output is correct
6 Correct 16 ms 23788 KB Output is correct
7 Correct 16 ms 23824 KB Output is correct
8 Correct 15 ms 23788 KB Output is correct
9 Correct 16 ms 23788 KB Output is correct
10 Correct 17 ms 23788 KB Output is correct
11 Correct 16 ms 23788 KB Output is correct
12 Correct 17 ms 23848 KB Output is correct
13 Correct 16 ms 23788 KB Output is correct
14 Correct 16 ms 23788 KB Output is correct
15 Correct 18 ms 23788 KB Output is correct
16 Correct 19 ms 23788 KB Output is correct
17 Correct 16 ms 23788 KB Output is correct
18 Correct 21 ms 23788 KB Output is correct
19 Correct 21 ms 23916 KB Output is correct
20 Correct 17 ms 23920 KB Output is correct
21 Correct 17 ms 23916 KB Output is correct
22 Correct 15 ms 23788 KB Output is correct
23 Correct 19 ms 23900 KB Output is correct
24 Correct 19 ms 23916 KB Output is correct
25 Correct 58 ms 24064 KB Output is correct
26 Correct 23 ms 23916 KB Output is correct
27 Correct 17 ms 24064 KB Output is correct
28 Correct 17 ms 23916 KB Output is correct
29 Correct 19 ms 23916 KB Output is correct
30 Correct 19 ms 23916 KB Output is correct
31 Execution timed out 1583 ms 24248 KB Time limit exceeded
32 Correct 435 ms 23916 KB Output is correct
33 Correct 23 ms 23916 KB Output is correct
34 Correct 29 ms 23916 KB Output is correct
35 Correct 198 ms 24940 KB Output is correct
36 Correct 180 ms 24940 KB Output is correct
37 Execution timed out 1599 ms 24300 KB Time limit exceeded
38 Correct 70 ms 25196 KB Output is correct
39 Correct 603 ms 24172 KB Output is correct
40 Correct 462 ms 24172 KB Output is correct
41 Correct 700 ms 24428 KB Output is correct
42 Correct 185 ms 24436 KB Output is correct
43 Correct 196 ms 24676 KB Output is correct
44 Correct 364 ms 25112 KB Output is correct
45 Execution timed out 1570 ms 24884 KB Time limit exceeded
46 Execution timed out 1541 ms 25096 KB Time limit exceeded
47 Correct 711 ms 25328 KB Output is correct
48 Correct 699 ms 25440 KB Output is correct
49 Execution timed out 1580 ms 25044 KB Time limit exceeded
50 Execution timed out 1581 ms 24108 KB Time limit exceeded