oj.uz

답안 #127172

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
127172 2019-07-09T03:21:49 Z briansu Port Facility (JOI17_port_facility) C++14
100 / 100
 2179 ms 134752 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> ii;
#define REP(i, n) for(int i = 0;i < n;i ++)
#define REP1(i, n) for(int i = 1;i <= n;i ++)
#define FILL(i, n) memset(i, n, sizeof(i))
#define X first
#define Y second
#define pb push_back
#define SZ(_a) ((int)(_a).size())
#define ALL(_a) (_a).begin(), (_a).end()
#ifdef brian
#define IOS()
template<typename T>void _do(T &&x){cerr<<x<<endl;}
template<typename T, typename ...t>void _do(T &&x, t &&...X){cerr<<x<<", ";_do(X...);}
#define debug(...) {\
	fprintf(stderr, "%s - %d (%s) = ", __PRETTY_FUNCTION__, __LINE__, #__VA_ARGS__);\
	_do(__VA_ARGS__);\
}
#else
#define IOS() ios_base::sync_with_stdio(0);cin.tie(0);
#define endl '\n'
#define debug(...)
#endif

const ll MAXn = 1e6 + 5;
const ll INF = ll(1e9);
const ll MOD = 1000000007;

vector<ll> v[MAXn];

ll in[MAXn], out[MAXn], vis[MAXn], ev[2 * MAXn];

namespace mnseg{
	int N;
	int d[4 * MAXn];
	void init(int n)
	{
		N = n;
		for(int i = 2 * n - 1;i > 0;i --)d[i] = INF;
	}
	void ins(ll x,ll k)
	{
		for(d[x += N] = k;x > 1;x >>= 1)d[x>>1] = min(d[x], d[x ^ 1]);
	}
	ll qr(ll l,ll r)
	{
		int ret = INF;
		for(l += N, r += N;l < r;l >>= 1, r >>= 1)
		{
			if(l & 1)ret = min(ret, d[l++]);
			if(r & 1)ret = min(ret, d[--r]);
		}
		return ret;
	}
};

namespace mxseg{
	int N;
	int d[4 * MAXn];
	void init(int n)
	{
		N = n;
		for(int i = 2 * n - 1;i > 0;i --)d[i] = 0;
	}
	void ins(ll x,ll k)
	{
		for(d[x += N] = k;x > 1;x >>= 1)d[x>>1] = max(d[x], d[x ^ 1]);
	}
	ll qr(ll l,ll r)
	{
		int ret = 0;
		for(l += N, r += N;l < r;l >>= 1, r >>= 1)
		{
			if(l & 1)ret = max(ret, d[l++]);
			if(r & 1)ret = max(ret, d[--r]);
		}
		return ret;
	}
};

ll n;
bool chk()
{
	vector<ll> a, b;
	REP1(i, 2 * n)
	{
		if(ev[i] < 0)
		{
			if(vis[-ev[i]])
			{
				if(b.back() != -ev[i])return 0;
				else b.pop_back();
			}
			else
			{
				if(a.back() != -ev[i])return 0;
				else a.pop_back();
			}
		}
		else
		{
			if(vis[ev[i]])b.pb(ev[i]);
			else a.pb(ev[i]);
		}
	}	
	return 1;
}

inline ll inter(ll i,ll j)
{
	return in[i] < in[j] && in[j] < out[i] && out[i] < out[j];
}

void dfs(ll now)
{
	mnseg::ins(out[now], INF);
	mxseg::ins(in[now], 0);
	while(1)
	{
		ll t = mnseg::qr(in[now] + 1, out[now]), x = -1;
		if(t < in[now])x = ev[t];
		else
		{
			t = mxseg::qr(in[now] + 1, out[now]);
			if(t > out[now])x = -ev[t];
		}
		if(x == -1)break;
		vis[x] = !vis[now];
		dfs(x);
	}
}

int main(){
	IOS();
	cin>>n;
	REP1(i, n)cin>>in[i]>>out[i], ev[in[i]] = i, ev[out[i]] = -i;

	ll ct = 0;
	FILL(vis, -1);
	mxseg::init(2 * (n + 2));
	mnseg::init(2 * (n + 2));
	REP1(i, n)mxseg::ins(in[i], out[i]);
	REP1(i, n)mnseg::ins(out[i], in[i]);
	REP1(i, n)if(vis[i] == -1)
	{
		ct ++;
		dfs(i);
	}
	debug(ct);
	if(!chk())cout<<0<<endl;
	else 
	{
		ll tt = 1;
		REP1(i, ct)tt = tt * 2  % MOD;
		cout<<tt<<endl;
	}
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 30 ms 31736 KB Output is correct
2 Correct 30 ms 31612 KB Output is correct
3 Correct 30 ms 31736 KB Output is correct
4 Correct 30 ms 31608 KB Output is correct
5 Correct 31 ms 31736 KB Output is correct
6 Correct 30 ms 31736 KB Output is correct
7 Correct 30 ms 31608 KB Output is correct
8 Correct 36 ms 31584 KB Output is correct
9 Correct 30 ms 31736 KB Output is correct
10 Correct 30 ms 31736 KB Output is correct
11 Correct 30 ms 31608 KB Output is correct
12 Correct 30 ms 31736 KB Output is correct
13 Correct 30 ms 31736 KB Output is correct
14 Correct 30 ms 31608 KB Output is correct
15 Correct 30 ms 31736 KB Output is correct
16 Correct 30 ms 31736 KB Output is correct
17 Correct 36 ms 31736 KB Output is correct
18 Correct 30 ms 31736 KB Output is correct
19 Correct 30 ms 31736 KB Output is correct
20 Correct 30 ms 31736 KB Output is correct
21 Correct 30 ms 31740 KB Output is correct
22 Correct 30 ms 31736 KB Output is correct
23 Correct 30 ms 31608 KB Output is correct
24 Correct 30 ms 31736 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 30 ms 31736 KB Output is correct
2 Correct 30 ms 31612 KB Output is correct
3 Correct 30 ms 31736 KB Output is correct
4 Correct 30 ms 31608 KB Output is correct
5 Correct 31 ms 31736 KB Output is correct
6 Correct 30 ms 31736 KB Output is correct
7 Correct 30 ms 31608 KB Output is correct
8 Correct 36 ms 31584 KB Output is correct
9 Correct 30 ms 31736 KB Output is correct
10 Correct 30 ms 31736 KB Output is correct
11 Correct 30 ms 31608 KB Output is correct
12 Correct 30 ms 31736 KB Output is correct
13 Correct 30 ms 31736 KB Output is correct
14 Correct 30 ms 31608 KB Output is correct
15 Correct 30 ms 31736 KB Output is correct
16 Correct 30 ms 31736 KB Output is correct
17 Correct 36 ms 31736 KB Output is correct
18 Correct 30 ms 31736 KB Output is correct
19 Correct 30 ms 31736 KB Output is correct
20 Correct 30 ms 31736 KB Output is correct
21 Correct 30 ms 31740 KB Output is correct
22 Correct 30 ms 31736 KB Output is correct
23 Correct 30 ms 31608 KB Output is correct
24 Correct 30 ms 31736 KB Output is correct
25 Correct 31 ms 31864 KB Output is correct
26 Correct 31 ms 31864 KB Output is correct
27 Correct 31 ms 31784 KB Output is correct
28 Correct 31 ms 31788 KB Output is correct
29 Correct 31 ms 31864 KB Output is correct
30 Correct 31 ms 31864 KB Output is correct
31 Correct 31 ms 31864 KB Output is correct
32 Correct 31 ms 31864 KB Output is correct
33 Correct 31 ms 31864 KB Output is correct
34 Correct 31 ms 31868 KB Output is correct
35 Correct 31 ms 31864 KB Output is correct
36 Correct 31 ms 31864 KB Output is correct
37 Correct 31 ms 31864 KB Output is correct
38 Correct 31 ms 31864 KB Output is correct
39 Correct 31 ms 31736 KB Output is correct
40 Correct 31 ms 31864 KB Output is correct
41 Correct 31 ms 31868 KB Output is correct
42 Correct 32 ms 31992 KB Output is correct
43 Correct 31 ms 31864 KB Output is correct
44 Correct 31 ms 31864 KB Output is correct

Subtask #3
56.0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 30 ms 31736 KB Output is correct
2 Correct 30 ms 31612 KB Output is correct
3 Correct 30 ms 31736 KB Output is correct
4 Correct 30 ms 31608 KB Output is correct
5 Correct 31 ms 31736 KB Output is correct
6 Correct 30 ms 31736 KB Output is correct
7 Correct 30 ms 31608 KB Output is correct
8 Correct 36 ms 31584 KB Output is correct
9 Correct 30 ms 31736 KB Output is correct
10 Correct 30 ms 31736 KB Output is correct
11 Correct 30 ms 31608 KB Output is correct
12 Correct 30 ms 31736 KB Output is correct
13 Correct 30 ms 31736 KB Output is correct
14 Correct 30 ms 31608 KB Output is correct
15 Correct 30 ms 31736 KB Output is correct
16 Correct 30 ms 31736 KB Output is correct
17 Correct 36 ms 31736 KB Output is correct
18 Correct 30 ms 31736 KB Output is correct
19 Correct 30 ms 31736 KB Output is correct
20 Correct 30 ms 31736 KB Output is correct
21 Correct 30 ms 31740 KB Output is correct
22 Correct 30 ms 31736 KB Output is correct
23 Correct 30 ms 31608 KB Output is correct
24 Correct 30 ms 31736 KB Output is correct
25 Correct 31 ms 31864 KB Output is correct
26 Correct 31 ms 31864 KB Output is correct
27 Correct 31 ms 31784 KB Output is correct
28 Correct 31 ms 31788 KB Output is correct
29 Correct 31 ms 31864 KB Output is correct
30 Correct 31 ms 31864 KB Output is correct
31 Correct 31 ms 31864 KB Output is correct
32 Correct 31 ms 31864 KB Output is correct
33 Correct 31 ms 31864 KB Output is correct
34 Correct 31 ms 31868 KB Output is correct
35 Correct 31 ms 31864 KB Output is correct
36 Correct 31 ms 31864 KB Output is correct
37 Correct 31 ms 31864 KB Output is correct
38 Correct 31 ms 31864 KB Output is correct
39 Correct 31 ms 31736 KB Output is correct
40 Correct 31 ms 31864 KB Output is correct
41 Correct 31 ms 31868 KB Output is correct
42 Correct 32 ms 31992 KB Output is correct
43 Correct 31 ms 31864 KB Output is correct
44 Correct 31 ms 31864 KB Output is correct
45 Correct 118 ms 38780 KB Output is correct
46 Correct 122 ms 40412 KB Output is correct
47 Correct 118 ms 39748 KB Output is correct
48 Correct 119 ms 40432 KB Output is correct
49 Correct 116 ms 40052 KB Output is correct
50 Correct 121 ms 40124 KB Output is correct
51 Correct 114 ms 40104 KB Output is correct
52 Correct 81 ms 39160 KB Output is correct
53 Correct 101 ms 40436 KB Output is correct
54 Correct 130 ms 41940 KB Output is correct
55 Correct 122 ms 40584 KB Output is correct
56 Correct 121 ms 40568 KB Output is correct
57 Correct 90 ms 39160 KB Output is correct
58 Correct 81 ms 39160 KB Output is correct
59 Correct 93 ms 39576 KB Output is correct
60 Correct 106 ms 39672 KB Output is correct
61 Correct 122 ms 39672 KB Output is correct
62 Correct 94 ms 39672 KB Output is correct
63 Correct 106 ms 39416 KB Output is correct
64 Correct 108 ms 39160 KB Output is correct
65 Correct 142 ms 41332 KB Output is correct
66 Correct 148 ms 41380 KB Output is correct
67 Correct 126 ms 41204 KB Output is correct
68 Correct 124 ms 41176 KB Output is correct
69 Correct 121 ms 41460 KB Output is correct
70 Correct 134 ms 41376 KB Output is correct
71 Correct 124 ms 41956 KB Output is correct
72 Correct 123 ms 41972 KB Output is correct
73 Correct 117 ms 41704 KB Output is correct
74 Correct 123 ms 41716 KB Output is correct
75 Correct 88 ms 40056 KB Output is correct
76 Correct 92 ms 40764 KB Output is correct
77 Correct 88 ms 40796 KB Output is correct
78 Correct 127 ms 40164 KB Output is correct
79 Correct 116 ms 40080 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 30 ms 31736 KB Output is correct
2 Correct 30 ms 31612 KB Output is correct
3 Correct 30 ms 31736 KB Output is correct
4 Correct 30 ms 31608 KB Output is correct
5 Correct 31 ms 31736 KB Output is correct
6 Correct 30 ms 31736 KB Output is correct
7 Correct 30 ms 31608 KB Output is correct
8 Correct 36 ms 31584 KB Output is correct
9 Correct 30 ms 31736 KB Output is correct
10 Correct 30 ms 31736 KB Output is correct
11 Correct 30 ms 31608 KB Output is correct
12 Correct 30 ms 31736 KB Output is correct
13 Correct 30 ms 31736 KB Output is correct
14 Correct 30 ms 31608 KB Output is correct
15 Correct 30 ms 31736 KB Output is correct
16 Correct 30 ms 31736 KB Output is correct
17 Correct 36 ms 31736 KB Output is correct
18 Correct 30 ms 31736 KB Output is correct
19 Correct 30 ms 31736 KB Output is correct
20 Correct 30 ms 31736 KB Output is correct
21 Correct 30 ms 31740 KB Output is correct
22 Correct 30 ms 31736 KB Output is correct
23 Correct 30 ms 31608 KB Output is correct
24 Correct 30 ms 31736 KB Output is correct
25 Correct 31 ms 31864 KB Output is correct
26 Correct 31 ms 31864 KB Output is correct
27 Correct 31 ms 31784 KB Output is correct
28 Correct 31 ms 31788 KB Output is correct
29 Correct 31 ms 31864 KB Output is correct
30 Correct 31 ms 31864 KB Output is correct
31 Correct 31 ms 31864 KB Output is correct
32 Correct 31 ms 31864 KB Output is correct
33 Correct 31 ms 31864 KB Output is correct
34 Correct 31 ms 31868 KB Output is correct
35 Correct 31 ms 31864 KB Output is correct
36 Correct 31 ms 31864 KB Output is correct
37 Correct 31 ms 31864 KB Output is correct
38 Correct 31 ms 31864 KB Output is correct
39 Correct 31 ms 31736 KB Output is correct
40 Correct 31 ms 31864 KB Output is correct
41 Correct 31 ms 31868 KB Output is correct
42 Correct 32 ms 31992 KB Output is correct
43 Correct 31 ms 31864 KB Output is correct
44 Correct 31 ms 31864 KB Output is correct
45 Correct 118 ms 38780 KB Output is correct
46 Correct 122 ms 40412 KB Output is correct
47 Correct 118 ms 39748 KB Output is correct
48 Correct 119 ms 40432 KB Output is correct
49 Correct 116 ms 40052 KB Output is correct
50 Correct 121 ms 40124 KB Output is correct
51 Correct 114 ms 40104 KB Output is correct
52 Correct 81 ms 39160 KB Output is correct
53 Correct 101 ms 40436 KB Output is correct
54 Correct 130 ms 41940 KB Output is correct
55 Correct 122 ms 40584 KB Output is correct
56 Correct 121 ms 40568 KB Output is correct
57 Correct 90 ms 39160 KB Output is correct
58 Correct 81 ms 39160 KB Output is correct
59 Correct 93 ms 39576 KB Output is correct
60 Correct 106 ms 39672 KB Output is correct
61 Correct 122 ms 39672 KB Output is correct
62 Correct 94 ms 39672 KB Output is correct
63 Correct 106 ms 39416 KB Output is correct
64 Correct 108 ms 39160 KB Output is correct
65 Correct 142 ms 41332 KB Output is correct
66 Correct 148 ms 41380 KB Output is correct
67 Correct 126 ms 41204 KB Output is correct
68 Correct 124 ms 41176 KB Output is correct
69 Correct 121 ms 41460 KB Output is correct
70 Correct 134 ms 41376 KB Output is correct
71 Correct 124 ms 41956 KB Output is correct
72 Correct 123 ms 41972 KB Output is correct
73 Correct 117 ms 41704 KB Output is correct
74 Correct 123 ms 41716 KB Output is correct
75 Correct 88 ms 40056 KB Output is correct
76 Correct 92 ms 40764 KB Output is correct
77 Correct 88 ms 40796 KB Output is correct
78 Correct 127 ms 40164 KB Output is correct
79 Correct 116 ms 40080 KB Output is correct
80 Correct 1456 ms 113952 KB Output is correct
81 Correct 1478 ms 113776 KB Output is correct
82 Correct 1397 ms 113064 KB Output is correct
83 Correct 1541 ms 113940 KB Output is correct
84 Correct 1493 ms 113868 KB Output is correct
85 Correct 1535 ms 113212 KB Output is correct
86 Correct 1419 ms 113712 KB Output is correct
87 Correct 1143 ms 108904 KB Output is correct
88 Correct 1359 ms 117200 KB Output is correct
89 Correct 1452 ms 134576 KB Output is correct
90 Correct 1426 ms 121840 KB Output is correct
91 Correct 1470 ms 121704 KB Output is correct
92 Correct 1255 ms 108956 KB Output is correct
93 Correct 1223 ms 109048 KB Output is correct
94 Correct 1367 ms 114660 KB Output is correct
95 Correct 1414 ms 112712 KB Output is correct
96 Correct 1396 ms 112292 KB Output is correct
97 Correct 1299 ms 114120 KB Output is correct
98 Correct 1398 ms 112464 KB Output is correct
99 Correct 1391 ms 112224 KB Output is correct
100 Correct 2179 ms 128672 KB Output is correct
101 Correct 2161 ms 128888 KB Output is correct
102 Correct 1526 ms 126820 KB Output is correct
103 Correct 1548 ms 126816 KB Output is correct
104 Correct 1453 ms 126832 KB Output is correct
105 Correct 1483 ms 126800 KB Output is correct
106 Correct 1465 ms 134664 KB Output is correct
107 Correct 1453 ms 134752 KB Output is correct
108 Correct 1411 ms 130392 KB Output is correct
109 Correct 1333 ms 130396 KB Output is correct
110 Correct 1116 ms 124252 KB Output is correct
111 Correct 1124 ms 124536 KB Output is correct
112 Correct 1305 ms 124624 KB Output is correct
113 Correct 1419 ms 113088 KB Output is correct
114 Correct 1435 ms 113744 KB Output is correct