oj.uz

Submission #39128

# Submission time Handle Problem Language Result Execution time Memory
39128 2018-01-09T13:06:19 Z RockyB Marriage questions (IZhO14_marriage) C++14
70 / 100
 1500 ms 3832 KB 
/// In The Name Of God
 
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,sse3,sse4,popcnt,abm,mmx")
 
#include <bits/stdc++.h>
 
#define f first
#define s second
 
#define pb push_back
#define pp pop_back
#define mp make_pair
 
#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()
 
#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);
 
#define nl '\n'
#define ioi exit(0);
 
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
 
const int N = (int)32000 + 7, inf = (int)1e9 + 7, mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;
const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1}, dy[] = {0, 1, 0, -1, 1, -1, 1, -1};
 
using namespace std;
 
int n, m, k;
vector <int> g[N];
 
int tmr, tmr1;
int p[N];

int was[N], good[N];
int dfs(int v, int L, int R) {
	if (was[v] == tmr) return 0;
	was[v] = tmr;
	for (auto to : g[v]) {
		if (!(L <= to && to <= R)) continue; 
		if (p[to] == -1 || dfs(p[to], L, R)) {
			p[to] = v;
			return 1;
		}
	}
	return 0;
}
int ok(int L, int R) {
	L += m, R += m;
	memset(p, -1, sizeof(p));
	++tmr;
	++tmr1;
	int cnt = 0, last = inf;
	for (int i = m; i >= 1; i--) {
		for (auto to : g[i]) {
			if (p[to] == -1 && L <= to && to <= R) {
				p[to] = i;
				good[i] = tmr1;
				last = min(last, to - m);
				++cnt;
				break;
			}
		}
	}
	if (cnt == m) return last;
	for (int i = 1; i <= m; i++) {
		if (good[i] == tmr1) continue;
		++tmr;
		int now = cnt;
		cnt += dfs(i, L, R);
	}
	if (cnt == m) {
		for (int i = m + 1; i <= n + m; i++) {
			if (p[i] != -1) {
				return i - m;
			}
		}
	}
	return 0;
}
int main() {
	#ifdef IOI2018
		freopen ("in.txt", "r", stdin);
	#endif
	Kazakhstan
	cin >> n >> m >> k;
	for (int i = 1; i <= k; i++) {
		int a, b;
		cin >> b >> a;
		g[a].pb(b + m);
	}
	for (int i = 1; i <= m; i++) {
		sort(all(g[i]), greater <int> ());
	}
	int ans = 0;
	for (int i = 1; i <= min(n, 5000); i++) {
		int l = i, r = n, res = n + 1, last = 0;
		while (l <= r) {
			int mid = l + r >> 1;
			int now = ok(i, mid);
			if (now) last = now;

			if (now) res = mid, r = mid - 1;
			else l = mid + 1;
		}
		if (last) {
			ans += (last - i + 1) * (n - res + 1);
			i = last;
		}
	}
	cout << ans;
	ioi
}

Compilation message

marriage.cpp: In function 'int ok(int, int)':
marriage.cpp:74:7: warning: unused variable 'now' [-Wunused-variable]
   int now = cnt;
       ^
marriage.cpp: In function 'int main()':
marriage.cpp:104:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    int mid = l + r >> 1;
                ^

Subtask #1
70.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3304 KB Output is correct
2 Correct 0 ms 3304 KB Output is correct
3 Correct 0 ms 3304 KB Output is correct
4 Correct 0 ms 3304 KB Output is correct
5 Correct 0 ms 3304 KB Output is correct
6 Correct 0 ms 3304 KB Output is correct
7 Correct 0 ms 3304 KB Output is correct
8 Correct 0 ms 3304 KB Output is correct
9 Correct 0 ms 3304 KB Output is correct
10 Correct 0 ms 3304 KB Output is correct
11 Correct 0 ms 3304 KB Output is correct
12 Correct 0 ms 3304 KB Output is correct
13 Correct 0 ms 3304 KB Output is correct
14 Correct 0 ms 3304 KB Output is correct
15 Correct 0 ms 3304 KB Output is correct
16 Correct 0 ms 3304 KB Output is correct
17 Correct 0 ms 3304 KB Output is correct
18 Correct 0 ms 3304 KB Output is correct
19 Correct 36 ms 3304 KB Output is correct
20 Correct 16 ms 3304 KB Output is correct
21 Correct 6 ms 3304 KB Output is correct
22 Correct 3 ms 3304 KB Output is correct
23 Correct 6 ms 3304 KB Output is correct
24 Correct 6 ms 3304 KB Output is correct
25 Correct 1073 ms 3304 KB Output is correct
26 Correct 243 ms 3304 KB Output is correct
27 Correct 39 ms 3304 KB Output is correct
28 Correct 16 ms 3304 KB Output is correct
29 Correct 73 ms 3304 KB Output is correct
30 Correct 69 ms 3304 KB Output is correct
31 Execution timed out 1500 ms 3568 KB Execution timed out
32 Execution timed out 1500 ms 3304 KB Execution timed out
33 Correct 109 ms 3304 KB Output is correct
34 Correct 73 ms 3304 KB Output is correct
35 Execution timed out 1500 ms 3832 KB Execution timed out
36 Execution timed out 1500 ms 3832 KB Execution timed out
37 Execution timed out 1500 ms 3568 KB Execution timed out
38 Execution timed out 1500 ms 3832 KB Execution timed out
39 Correct 379 ms 3304 KB Output is correct
40 Execution timed out 1500 ms 3304 KB Execution timed out
41 Correct 1022 ms 3436 KB Output is correct
42 Execution timed out 1500 ms 3436 KB Execution timed out
43 Execution timed out 1500 ms 3568 KB Execution timed out
44 Execution timed out 1500 ms 3832 KB Execution timed out
45 Incorrect 13 ms 3436 KB Output isn't correct
46 Incorrect 129 ms 3832 KB Output isn't correct
47 Execution timed out 1500 ms 3832 KB Execution timed out
48 Execution timed out 1500 ms 3832 KB Execution timed out
49 Incorrect 343 ms 3832 KB Output isn't correct
50 Correct 3 ms 3304 KB Output is correct