oj.uz

Submission #345254

# Submission time Handle Problem Language Result Execution time Memory
345254 2021-01-07T07:03:38 Z maskoff Marriage questions (IZhO14_marriage) C++14
86 / 100
 1500 ms 25436 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];
vector<int> g[N], all[N];

bool go(int v) {
	if (used[v] == timer) return false;
	used[v] = timer;
 	for (int to : g[v]) 
 		if (mt[to] == false) {
 		 	mt[to] = v;
 		 	pr[v] = to;
 		 	return true;
 		}    
	for (int to : g[v])
		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 i = 1; i <= m; i++)
		g[i].clear();
	for (int i = y; i <= p; i++) {
	 	for (int j : all[i])
	 		g[j].pb(i);
	}
	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;
}

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;
	for (int i = 1; i <= n; i++) {
		int l = i + m - 1;
		int r = n;
		int ans = -1;
		while (l <= r) {
		 	int mid = l + r >> 1;
		 	if (check(i, mid)) ans = mid, r = mid - 1;
		 	else l = mid + 1;
		}
		if (ans == -1) break;
		else res += (n - ans + 1);
	}
	cout << res;
  return 0;              
}

Compilation message

marriage.cpp: In function 'int main()':
marriage.cpp:81:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   81 |     int mid = l + r >> 1;
      |               ~~^~~

Subtask #1
86.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23788 KB Output is correct
2 Correct 17 ms 23788 KB Output is correct
3 Correct 19 ms 23788 KB Output is correct
4 Correct 14 ms 23788 KB Output is correct
5 Correct 23 ms 23788 KB Output is correct
6 Correct 18 ms 23788 KB Output is correct
7 Correct 22 ms 23788 KB Output is correct
8 Correct 14 ms 23788 KB Output is correct
9 Correct 20 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 23 ms 23788 KB Output is correct
13 Correct 15 ms 23788 KB Output is correct
14 Correct 15 ms 23788 KB Output is correct
15 Correct 18 ms 23952 KB Output is correct
16 Correct 17 ms 23788 KB Output is correct
17 Correct 20 ms 23788 KB Output is correct
18 Correct 18 ms 23880 KB Output is correct
19 Correct 20 ms 23916 KB Output is correct
20 Correct 19 ms 23788 KB Output is correct
21 Correct 16 ms 23788 KB Output is correct
22 Correct 17 ms 23788 KB Output is correct
23 Correct 20 ms 24044 KB Output is correct
24 Correct 17 ms 23788 KB Output is correct
25 Correct 91 ms 24044 KB Output is correct
26 Correct 40 ms 23916 KB Output is correct
27 Correct 20 ms 23916 KB Output is correct
28 Correct 23 ms 23788 KB Output is correct
29 Correct 43 ms 24044 KB Output is correct
30 Correct 54 ms 23916 KB Output is correct
31 Correct 942 ms 24428 KB Output is correct
32 Correct 86 ms 23916 KB Output is correct
33 Correct 18 ms 23916 KB Output is correct
34 Correct 79 ms 23916 KB Output is correct
35 Correct 938 ms 24976 KB Output is correct
36 Correct 737 ms 24812 KB Output is correct
37 Execution timed out 1582 ms 24592 KB Time limit exceeded
38 Correct 722 ms 25200 KB Output is correct
39 Execution timed out 1572 ms 24172 KB Time limit exceeded
40 Correct 25 ms 24172 KB Output is correct
41 Execution timed out 1551 ms 24428 KB Time limit exceeded
42 Correct 168 ms 24556 KB Output is correct
43 Correct 399 ms 24668 KB Output is correct
44 Correct 421 ms 25112 KB Output is correct
45 Execution timed out 1557 ms 24684 KB Time limit exceeded
46 Execution timed out 1562 ms 25324 KB Time limit exceeded
47 Correct 854 ms 25436 KB Output is correct
48 Correct 770 ms 25436 KB Output is correct
49 Execution timed out 1520 ms 25428 KB Time limit exceeded
50 Execution timed out 1571 ms 24172 KB Time limit exceeded