Submission #345167

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
345167	2021-01-07T05:42:14 Z	maskoff	Marriage questions (IZhO14_marriage)	C++14	72 / 100	1500 ms	26476 KB

marriage

#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;
int used[N], mt[N], pr[N];
vector<int> g[N], all[N];

bool go(int v) {
 	if (used[v]) return false;
 	used[v] = true;
 	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 (mt + 1, mt + 1 + n, false);
	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++) {
		fill(used + 1, used + 1 + m, false);
		go(i);
	}
	for (int i = 1; i <= m; i++)
		if (pr[i] == 0)
			return false;
	return true;
}

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);
	}
	int res = 0;
	for (int i = 1; i <= n; i++) {
		int l = i;
		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:82:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   82 |     int mid = l + r >> 1;
      |               ~~^~~

Subtask #1

72.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	20 ms	23788 KB	Output is correct
2	Correct	18 ms	23788 KB	Output is correct
3	Correct	17 ms	23788 KB	Output is correct
4	Correct	19 ms	23788 KB	Output is correct
5	Correct	17 ms	23936 KB	Output is correct
6	Correct	21 ms	23788 KB	Output is correct
7	Correct	18 ms	23788 KB	Output is correct
8	Correct	17 ms	23788 KB	Output is correct
9	Correct	17 ms	23788 KB	Output is correct
10	Correct	25 ms	23848 KB	Output is correct
11	Correct	20 ms	23788 KB	Output is correct
12	Correct	19 ms	23788 KB	Output is correct
13	Correct	18 ms	23788 KB	Output is correct
14	Correct	20 ms	23976 KB	Output is correct
15	Correct	21 ms	23788 KB	Output is correct
16	Correct	20 ms	23788 KB	Output is correct
17	Correct	21 ms	23788 KB	Output is correct
18	Correct	24 ms	23788 KB	Output is correct
19	Correct	28 ms	23916 KB	Output is correct
20	Correct	22 ms	23936 KB	Output is correct
21	Correct	21 ms	23828 KB	Output is correct
22	Correct	24 ms	23788 KB	Output is correct
23	Correct	21 ms	23892 KB	Output is correct
24	Correct	19 ms	23916 KB	Output is correct
25	Correct	251 ms	24128 KB	Output is correct
26	Correct	89 ms	23964 KB	Output is correct
27	Correct	17 ms	23916 KB	Output is correct
28	Correct	38 ms	23916 KB	Output is correct
29	Correct	48 ms	24044 KB	Output is correct
30	Correct	64 ms	24044 KB	Output is correct
31	Execution timed out	1577 ms	24812 KB	Time limit exceeded
32	Correct	464 ms	24056 KB	Output is correct
33	Correct	18 ms	23916 KB	Output is correct
34	Correct	428 ms	23984 KB	Output is correct
35	Execution timed out	1543 ms	25684 KB	Time limit exceeded
36	Execution timed out	1598 ms	25608 KB	Time limit exceeded
37	Execution timed out	1565 ms	24984 KB	Time limit exceeded
38	Execution timed out	1573 ms	25932 KB	Time limit exceeded
39	Execution timed out	1548 ms	24172 KB	Time limit exceeded
40	Correct	88 ms	24300 KB	Output is correct
41	Execution timed out	1562 ms	24556 KB	Time limit exceeded
42	Correct	508 ms	24812 KB	Output is correct
43	Correct	893 ms	25136 KB	Output is correct
44	Execution timed out	1588 ms	25964 KB	Time limit exceeded
45	Execution timed out	1585 ms	25068 KB	Time limit exceeded
46	Execution timed out	1554 ms	26328 KB	Time limit exceeded
47	Execution timed out	1542 ms	26408 KB	Time limit exceeded
48	Execution timed out	1573 ms	26220 KB	Time limit exceeded
49	Execution timed out	1577 ms	26476 KB	Time limit exceeded
50	Execution timed out	1564 ms	24300 KB	Time limit exceeded