oj.uz

Submission #345390

# Submission time Handle Problem Language Result Execution time Memory
345390 2021-01-07T08:29:34 Z maskoff Marriage questions (IZhO14_marriage) C++14
88 / 100
 1500 ms 25904 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) {
	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;
		pr[i] = false;
	}
	
	return ok;
}

bool clear(int x) {
 	for (int j : all[x]) 
 		s[j]++;
 	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;
		pr[i] = false;
	}
	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 19 ms 23788 KB Output is correct
2 Correct 17 ms 23788 KB Output is correct
3 Correct 17 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 18 ms 23788 KB Output is correct
7 Correct 17 ms 23908 KB Output is correct
8 Correct 16 ms 23800 KB Output is correct
9 Correct 18 ms 23788 KB Output is correct
10 Correct 16 ms 23788 KB Output is correct
11 Correct 16 ms 23824 KB Output is correct
12 Correct 16 ms 23788 KB Output is correct
13 Correct 24 ms 24044 KB Output is correct
14 Correct 18 ms 23716 KB Output is correct
15 Correct 21 ms 23792 KB Output is correct
16 Correct 133 ms 23788 KB Output is correct
17 Correct 136 ms 23820 KB Output is correct
18 Correct 16 ms 23916 KB Output is correct
19 Correct 20 ms 23948 KB Output is correct
20 Correct 20 ms 23920 KB Output is correct
21 Correct 17 ms 23916 KB Output is correct
22 Correct 16 ms 23788 KB Output is correct
23 Correct 17 ms 23916 KB Output is correct
24 Correct 127 ms 23916 KB Output is correct
25 Correct 297 ms 24052 KB Output is correct
26 Correct 25 ms 24044 KB Output is correct
27 Correct 18 ms 23916 KB Output is correct
28 Correct 21 ms 23916 KB Output is correct
29 Correct 21 ms 23928 KB Output is correct
30 Correct 19 ms 23916 KB Output is correct
31 Execution timed out 1586 ms 24348 KB Time limit exceeded
32 Correct 412 ms 23984 KB Output is correct
33 Correct 22 ms 23916 KB Output is correct
34 Correct 36 ms 24044 KB Output is correct
35 Correct 195 ms 25012 KB Output is correct
36 Correct 250 ms 25088 KB Output is correct
37 Execution timed out 1595 ms 24304 KB Time limit exceeded
38 Correct 75 ms 25196 KB Output is correct
39 Correct 562 ms 24208 KB Output is correct
40 Correct 444 ms 24308 KB Output is correct
41 Correct 721 ms 24428 KB Output is correct
42 Correct 180 ms 24472 KB Output is correct
43 Correct 187 ms 24556 KB Output is correct
44 Correct 346 ms 25068 KB Output is correct
45 Execution timed out 1593 ms 24812 KB Time limit exceeded
46 Execution timed out 1583 ms 25612 KB Time limit exceeded
47 Correct 641 ms 25904 KB Output is correct
48 Correct 644 ms 25868 KB Output is correct
49 Execution timed out 1554 ms 25588 KB Time limit exceeded
50 Execution timed out 1591 ms 24172 KB Time limit exceeded