답안 #20496 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
20496	2017-02-12T06:05:41 Z	안녕하세요 투어리스트입니다 진짜에요(#49, Namnamseo)	초음속철도 (OJUZ11_rail)	C++14	100 / 100	733 ms	44224 KB

rail

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pp;
void read(int& x){ scanf("%d",&x); }
template<typename T,typename... Args>
void read(T& a,Args&... b){ read(a); read(b...); }
#define all(x) (x).begin(),(x).end()
#define pb push_back

pp data[200010];
int n;
vector<int> xp;

void in(){
	int p;
	read(p); xp.pb(1); xp.pb(p);
	read(n);
	for(int i=1; i<=n; ++i){
		int a, b; read(a, b);
		xp.pb(a); xp.pb(b); data[i]=pp{a, b};
	}
}

int xn;

void cc(){
	sort(all(xp));
	xp.erase(unique(all(xp)), xp.end());
	for(int i=1; i<=n; ++i){
		int a, b; tie(a, b) = data[i];
		a = lower_bound(all(xp), a) - xp.begin();
		b = lower_bound(all(xp), b) - xp.begin();
		data[i] = pp{a, b};
	}
	xn = xp.size();
}

const ll M=1'000'000'007;
const ll inv2=(M+1)/2;
ll dp[200010];
ll p2[400010];

auto rcmp = [](const pp& a, const pp& b){ return a.second < b.second; };

struct SEG {
	static const int T=524288;
	ll tsum[T<<1];
	ll tdp [T<<1];
	ll ttwo[T<<1];
	ll lazy[T<<1];
	void init(){
		for(auto& x:ttwo) x=1;
		for(auto& x:lazy) x=1;
	}
	void pd(int l, int r, int p){
		if(l==r || lazy[p]==1) return;
		for(int i=0; i<2; ++i){
			int x=p*2+i;
			tsum[x] = (tsum[x]*lazy[p])%M;
			ttwo[x] = (ttwo[x]*lazy[p])%M;
			lazy[x] = (lazy[x]*lazy[p])%M;
		}
		lazy[p]=1;
	}
	void divhalf(int l, int r, int ml=0, int mr=n, int p=1){
		pd(ml, mr, p);
		if(r<ml || mr<l) return;
		if(l<=ml && mr<=r){
			tsum[p] = (tsum[p]*inv2)%M;
			ttwo[p] = (ttwo[p]*inv2)%M;
			lazy[p] = inv2;
			return;
		}
		int mid=(ml+mr)/2;
		divhalf(l, r, ml, mid, p*2);
		divhalf(l, r, mid+1, mr, p*2+1);
		tsum[p]=(tsum[p*2]+tsum[p*2+1])%M;
	}
	ll rsum(int l, int r, int ml=0, int mr=n, int p=1){
		pd(ml, mr, p);
		if(r<ml || mr<l) return 0;
		if(l<=ml && mr<=r) return tsum[p];
		int mid=(ml+mr)/2;
		return rsum(l, r, ml, mid, p*2) + rsum(l, r, mid+1, mr, p*2+1);
	}
	void upd(int up, ll uv, int ml=0, int mr=n, int p=1){
		pd(ml, mr, p);
		if(up<ml || mr<up) return;
		if(ml==up && mr==up){
			tdp[p]=uv;
			tsum[p]=(tdp[p]*ttwo[p])%M;
			return;
		}
		int mid=(ml+mr)/2;
		upd(up, uv, ml, mid, p*2);
		upd(up, uv, mid+1, mr, p*2+1);
		tsum[p]=(tsum[p*2]+tsum[p*2+1])%M;
	}
} seg;

int main()
{
	//freopen("in", "r", stdin);
    in(); cc();
    
    p2[0]=1; for(int i=1; i<=400000; ++i) p2[i]=(p2[i-1]*2)%M;
    
    sort(data+1, data+n+1, rcmp);
    
    seg.init();
    dp[0]=1; seg.upd(0, 1);
    
    for(int i=1; i<=n; ++i){
		int a, b; tie(a, b) = data[i];
		int last = lower_bound(data, data+n+1, pp{0, a}, rcmp)-data-1;
		ll invdp = seg.rsum(0, last);
		invdp = (invdp * p2[i-1])%M;
		dp[i] = (p2[i-1]-invdp+M)%M;
		seg.divhalf(last+1, n);
		seg.upd(i, dp[i]);
    }
    
    ll ans=0;
    for(int i=1; i<=n; ++i) if(data[i].second == xn-1) ans = (ans+dp[i])%M;
    printf("%lld\n", ans);
    return 0;
}

Compilation message

rail.cpp: In function 'void read(int&)':
rail.cpp:5:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 void read(int& x){ scanf("%d",&x); }
                                  ^

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	41068 KB	Output is correct
2	Correct	6 ms	41068 KB	Output is correct
3	Correct	9 ms	41068 KB	Output is correct
4	Correct	6 ms	41068 KB	Output is correct
5	Correct	6 ms	41068 KB	Output is correct
6	Correct	3 ms	41068 KB	Output is correct
7	Correct	3 ms	41068 KB	Output is correct
8	Correct	3 ms	41068 KB	Output is correct
9	Correct	3 ms	41068 KB	Output is correct
10	Correct	3 ms	41068 KB	Output is correct
11	Correct	3 ms	41068 KB	Output is correct
12	Correct	3 ms	41068 KB	Output is correct
13	Correct	0 ms	41068 KB	Output is correct
14	Correct	3 ms	41068 KB	Output is correct
15	Correct	6 ms	41068 KB	Output is correct
16	Correct	6 ms	41068 KB	Output is correct
17	Correct	3 ms	41068 KB	Output is correct
18	Correct	6 ms	41068 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	41068 KB	Output is correct
2	Correct	6 ms	41068 KB	Output is correct
3	Correct	9 ms	41068 KB	Output is correct
4	Correct	6 ms	41068 KB	Output is correct
5	Correct	6 ms	41068 KB	Output is correct
6	Correct	3 ms	41068 KB	Output is correct
7	Correct	3 ms	41068 KB	Output is correct
8	Correct	3 ms	41068 KB	Output is correct
9	Correct	3 ms	41068 KB	Output is correct
10	Correct	3 ms	41068 KB	Output is correct
11	Correct	3 ms	41068 KB	Output is correct
12	Correct	3 ms	41068 KB	Output is correct
13	Correct	0 ms	41068 KB	Output is correct
14	Correct	3 ms	41068 KB	Output is correct
15	Correct	6 ms	41068 KB	Output is correct
16	Correct	6 ms	41068 KB	Output is correct
17	Correct	3 ms	41068 KB	Output is correct
18	Correct	6 ms	41068 KB	Output is correct
19	Correct	3 ms	41068 KB	Output is correct
20	Correct	0 ms	41068 KB	Output is correct
21	Correct	3 ms	41068 KB	Output is correct
22	Correct	3 ms	41068 KB	Output is correct
23	Correct	0 ms	41068 KB	Output is correct
24	Correct	6 ms	41068 KB	Output is correct
25	Correct	0 ms	41068 KB	Output is correct
26	Correct	9 ms	41068 KB	Output is correct
27	Correct	0 ms	41068 KB	Output is correct
28	Correct	6 ms	41068 KB	Output is correct
29	Correct	3 ms	41068 KB	Output is correct
30	Correct	0 ms	41068 KB	Output is correct
31	Correct	6 ms	41068 KB	Output is correct
32	Correct	0 ms	41068 KB	Output is correct
33	Correct	6 ms	41068 KB	Output is correct
34	Correct	3 ms	41068 KB	Output is correct
35	Correct	3 ms	41068 KB	Output is correct

Subtask #3
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	41068 KB	Output is correct
2	Correct	3 ms	41068 KB	Output is correct
3	Correct	9 ms	41068 KB	Output is correct
4	Correct	9 ms	41208 KB	Output is correct
5	Correct	426 ms	44224 KB	Output is correct
6	Correct	419 ms	44224 KB	Output is correct
7	Correct	389 ms	44224 KB	Output is correct
8	Correct	3 ms	41068 KB	Output is correct
9	Correct	356 ms	44224 KB	Output is correct
10	Correct	399 ms	44224 KB	Output is correct
11	Correct	179 ms	42688 KB	Output is correct
12	Correct	393 ms	44224 KB	Output is correct
13	Correct	383 ms	44224 KB	Output is correct
14	Correct	299 ms	44224 KB	Output is correct
15	Correct	396 ms	44224 KB	Output is correct
16	Correct	336 ms	44224 KB	Output is correct
17	Correct	406 ms	44224 KB	Output is correct
18	Correct	393 ms	44224 KB	Output is correct
19	Correct	426 ms	44224 KB	Output is correct

Subtask #4
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	41068 KB	Output is correct
2	Correct	6 ms	41068 KB	Output is correct
3	Correct	9 ms	41068 KB	Output is correct
4	Correct	6 ms	41068 KB	Output is correct
5	Correct	6 ms	41068 KB	Output is correct
6	Correct	3 ms	41068 KB	Output is correct
7	Correct	3 ms	41068 KB	Output is correct
8	Correct	3 ms	41068 KB	Output is correct
9	Correct	3 ms	41068 KB	Output is correct
10	Correct	3 ms	41068 KB	Output is correct
11	Correct	3 ms	41068 KB	Output is correct
12	Correct	3 ms	41068 KB	Output is correct
13	Correct	0 ms	41068 KB	Output is correct
14	Correct	3 ms	41068 KB	Output is correct
15	Correct	6 ms	41068 KB	Output is correct
16	Correct	6 ms	41068 KB	Output is correct
17	Correct	3 ms	41068 KB	Output is correct
18	Correct	6 ms	41068 KB	Output is correct
19	Correct	3 ms	41068 KB	Output is correct
20	Correct	0 ms	41068 KB	Output is correct
21	Correct	3 ms	41068 KB	Output is correct
22	Correct	3 ms	41068 KB	Output is correct
23	Correct	0 ms	41068 KB	Output is correct
24	Correct	6 ms	41068 KB	Output is correct
25	Correct	0 ms	41068 KB	Output is correct
26	Correct	9 ms	41068 KB	Output is correct
27	Correct	0 ms	41068 KB	Output is correct
28	Correct	6 ms	41068 KB	Output is correct
29	Correct	3 ms	41068 KB	Output is correct
30	Correct	0 ms	41068 KB	Output is correct
31	Correct	6 ms	41068 KB	Output is correct
32	Correct	0 ms	41068 KB	Output is correct
33	Correct	6 ms	41068 KB	Output is correct
34	Correct	3 ms	41068 KB	Output is correct
35	Correct	3 ms	41068 KB	Output is correct
36	Correct	19 ms	41208 KB	Output is correct
37	Correct	13 ms	41208 KB	Output is correct
38	Correct	13 ms	41208 KB	Output is correct
39	Correct	9 ms	41208 KB	Output is correct
40	Correct	13 ms	41208 KB	Output is correct
41	Correct	13 ms	41208 KB	Output is correct
42	Correct	9 ms	41208 KB	Output is correct
43	Correct	3 ms	41068 KB	Output is correct
44	Correct	16 ms	41208 KB	Output is correct
45	Correct	9 ms	41208 KB	Output is correct
46	Correct	16 ms	41208 KB	Output is correct
47	Correct	13 ms	41208 KB	Output is correct
48	Correct	13 ms	41208 KB	Output is correct
49	Correct	13 ms	41208 KB	Output is correct
50	Correct	6 ms	41208 KB	Output is correct
51	Correct	13 ms	41208 KB	Output is correct
52	Correct	6 ms	41068 KB	Output is correct
53	Correct	13 ms	41208 KB	Output is correct
54	Correct	6 ms	41208 KB	Output is correct
55	Correct	16 ms	41208 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	41068 KB	Output is correct
2	Correct	6 ms	41068 KB	Output is correct
3	Correct	9 ms	41068 KB	Output is correct
4	Correct	6 ms	41068 KB	Output is correct
5	Correct	6 ms	41068 KB	Output is correct
6	Correct	3 ms	41068 KB	Output is correct
7	Correct	3 ms	41068 KB	Output is correct
8	Correct	3 ms	41068 KB	Output is correct
9	Correct	3 ms	41068 KB	Output is correct
10	Correct	3 ms	41068 KB	Output is correct
11	Correct	3 ms	41068 KB	Output is correct
12	Correct	3 ms	41068 KB	Output is correct
13	Correct	0 ms	41068 KB	Output is correct
14	Correct	3 ms	41068 KB	Output is correct
15	Correct	6 ms	41068 KB	Output is correct
16	Correct	6 ms	41068 KB	Output is correct
17	Correct	3 ms	41068 KB	Output is correct
18	Correct	6 ms	41068 KB	Output is correct
19	Correct	3 ms	41068 KB	Output is correct
20	Correct	0 ms	41068 KB	Output is correct
21	Correct	3 ms	41068 KB	Output is correct
22	Correct	3 ms	41068 KB	Output is correct
23	Correct	0 ms	41068 KB	Output is correct
24	Correct	6 ms	41068 KB	Output is correct
25	Correct	0 ms	41068 KB	Output is correct
26	Correct	9 ms	41068 KB	Output is correct
27	Correct	0 ms	41068 KB	Output is correct
28	Correct	6 ms	41068 KB	Output is correct
29	Correct	3 ms	41068 KB	Output is correct
30	Correct	0 ms	41068 KB	Output is correct
31	Correct	6 ms	41068 KB	Output is correct
32	Correct	0 ms	41068 KB	Output is correct
33	Correct	6 ms	41068 KB	Output is correct
34	Correct	3 ms	41068 KB	Output is correct
35	Correct	3 ms	41068 KB	Output is correct
36	Correct	3 ms	41068 KB	Output is correct
37	Correct	3 ms	41068 KB	Output is correct
38	Correct	9 ms	41068 KB	Output is correct
39	Correct	9 ms	41208 KB	Output is correct
40	Correct	426 ms	44224 KB	Output is correct
41	Correct	419 ms	44224 KB	Output is correct
42	Correct	389 ms	44224 KB	Output is correct
43	Correct	3 ms	41068 KB	Output is correct
44	Correct	356 ms	44224 KB	Output is correct
45	Correct	399 ms	44224 KB	Output is correct
46	Correct	179 ms	42688 KB	Output is correct
47	Correct	393 ms	44224 KB	Output is correct
48	Correct	383 ms	44224 KB	Output is correct
49	Correct	299 ms	44224 KB	Output is correct
50	Correct	396 ms	44224 KB	Output is correct
51	Correct	336 ms	44224 KB	Output is correct
52	Correct	406 ms	44224 KB	Output is correct
53	Correct	393 ms	44224 KB	Output is correct
54	Correct	426 ms	44224 KB	Output is correct
55	Correct	19 ms	41208 KB	Output is correct
56	Correct	13 ms	41208 KB	Output is correct
57	Correct	13 ms	41208 KB	Output is correct
58	Correct	9 ms	41208 KB	Output is correct
59	Correct	13 ms	41208 KB	Output is correct
60	Correct	13 ms	41208 KB	Output is correct
61	Correct	9 ms	41208 KB	Output is correct
62	Correct	3 ms	41068 KB	Output is correct
63	Correct	16 ms	41208 KB	Output is correct
64	Correct	9 ms	41208 KB	Output is correct
65	Correct	16 ms	41208 KB	Output is correct
66	Correct	13 ms	41208 KB	Output is correct
67	Correct	13 ms	41208 KB	Output is correct
68	Correct	13 ms	41208 KB	Output is correct
69	Correct	6 ms	41208 KB	Output is correct
70	Correct	13 ms	41208 KB	Output is correct
71	Correct	6 ms	41068 KB	Output is correct
72	Correct	13 ms	41208 KB	Output is correct
73	Correct	6 ms	41208 KB	Output is correct
74	Correct	16 ms	41208 KB	Output is correct
75	Correct	719 ms	44224 KB	Output is correct
76	Correct	453 ms	44224 KB	Output is correct
77	Correct	599 ms	44224 KB	Output is correct
78	Correct	383 ms	44224 KB	Output is correct
79	Correct	653 ms	44224 KB	Output is correct
80	Correct	719 ms	44224 KB	Output is correct
81	Correct	13 ms	41208 KB	Output is correct
82	Correct	646 ms	44224 KB	Output is correct
83	Correct	263 ms	44224 KB	Output is correct
84	Correct	623 ms	44224 KB	Output is correct
85	Correct	646 ms	44224 KB	Output is correct
86	Correct	646 ms	44224 KB	Output is correct
87	Correct	449 ms	44224 KB	Output is correct
88	Correct	443 ms	44224 KB	Output is correct
89	Correct	733 ms	44224 KB	Output is correct
90	Correct	733 ms	44224 KB	Output is correct
91	Correct	719 ms	44224 KB	Output is correct
92	Correct	636 ms	44224 KB	Output is correct
93	Correct	646 ms	44224 KB	Output is correct
94	Correct	716 ms	44224 KB	Output is correct
95	Correct	716 ms	44224 KB	Output is correct

답안 #20496

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 8.0 / 8.0

Subtask #3 25.0 / 25.0

Subtask #4 27.0 / 27.0

Subtask #5 30.0 / 30.0

Subtask #1
10.0 / 10.0

Subtask #2
8.0 / 8.0

Subtask #3
25.0 / 25.0

Subtask #4
27.0 / 27.0

Subtask #5
30.0 / 30.0