답안 #407563

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
407563	2021-05-19T03:11:57 Z	maomao90	The short shank; Redemption (BOI21_prison)	C++17	100 / 100	552 ms	219248 KB

prison

#include <bits/stdc++.h> 
using namespace std;

template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1: 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define MP make_pair
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
#define MT make_tuple
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define pb emplace_back
typedef vector<int> vi;
typedef vector<ii> vii;

#define INF 1000000005
#define LINF 1000000000000000005
#define MOD 1000000007
#define MAXN 2000005

int n, d, t;
int ti[MAXN];
stack<ii> stk;
bool alr[MAXN], die[MAXN];
vi adj[MAXN];
int prv[MAXN], p[MAXN];
int ans;
priority_queue<ii> pq;

int dp[MAXN];
void dfs(int u) {
	p[u] = -1;
	for (int v : adj[u]) {
		dfs(v);
		if (mxto(dp[u], dp[v] + 1)) {
			p[u] = v;
		}
	}
}

int main() {
	scanf("%d%d%d", &n, &d, &t);
	REP (i, 1, n + 1) {
		scanf("%d", &ti[i]);
	}
	REP (i, 1, n + 1) {
		while (!stk.empty() && stk.top().FI < i) stk.pop();
		if (ti[i] <= t) {
			int nxt = i + t - ti[i];
			stk.push(MP(nxt, i));
			alr[i] = 1;
		} else {
			if (stk.empty()) {
				die[i] = 1;
				ans++;
			} else {
				prv[i] = stk.top().SE;
			}
		}
	}
	while (!stk.empty()) stk.pop();
	REP (i, 1, n + 1) {
		if (die[i] || alr[i]) continue;
		while (!stk.empty() && stk.top().FI > prv[i]) {
			adj[i].pb(stk.top().FI);
			stk.pop();
		}
		stk.push(MP(i, -1));
	}
	//REP (i, 1, n + 1) {
		//printf("%d:", i);
		//for (int v : adj[i]) {
			//printf(" %d", v);
		//}
		//printf("\n");
	//}
	while (!stk.empty()) {
		int tp = stk.top().FI; stk.pop();
		dfs(tp);
		pq.push(MP(dp[tp], tp));
	}
	while (!pq.empty() && d) {
		auto [l, u] = pq.top(); pq.pop();
		ans += l + 1;
		while (p[u] != -1) {
			for (int v : adj[u]) {
				if (v == p[u]) continue;
				pq.push(MP(dp[v], v));
			}
			u = p[u];
		}
		d--;
	}
	ans = n - ans;
	printf("%d\n", ans);
	return 0;
}

/*
5 1 42                          
13 37 47 11 42

5 2 5 
1 9 4 6 7
*/

Compilation message

prison.cpp: In function 'int main()':
prison.cpp:50:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |  scanf("%d%d%d", &n, &d, &t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
prison.cpp:52:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |   scanf("%d", &ti[i]);
      |   ~~~~~^~~~~~~~~~~~~~

Subtask #1

15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	25 ms	47308 KB	Output is correct
2	Correct	26 ms	47292 KB	Output is correct
3	Correct	26 ms	47312 KB	Output is correct
4	Correct	26 ms	47304 KB	Output is correct
5	Correct	27 ms	47308 KB	Output is correct
6	Correct	25 ms	47308 KB	Output is correct
7	Correct	25 ms	47324 KB	Output is correct
8	Correct	25 ms	47292 KB	Output is correct
9	Correct	25 ms	47288 KB	Output is correct
10	Correct	26 ms	47232 KB	Output is correct
11	Correct	26 ms	47252 KB	Output is correct

Subtask #2

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	30 ms	47308 KB	Output is correct
2	Correct	121 ms	66520 KB	Output is correct
3	Correct	119 ms	64176 KB	Output is correct
4	Correct	126 ms	67352 KB	Output is correct
5	Correct	111 ms	66372 KB	Output is correct
6	Correct	112 ms	66312 KB	Output is correct
7	Correct	152 ms	105928 KB	Output is correct
8	Correct	116 ms	68744 KB	Output is correct

Subtask #3

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	25 ms	47308 KB	Output is correct
2	Correct	26 ms	47292 KB	Output is correct
3	Correct	26 ms	47312 KB	Output is correct
4	Correct	26 ms	47304 KB	Output is correct
5	Correct	27 ms	47308 KB	Output is correct
6	Correct	25 ms	47308 KB	Output is correct
7	Correct	25 ms	47324 KB	Output is correct
8	Correct	25 ms	47292 KB	Output is correct
9	Correct	25 ms	47288 KB	Output is correct
10	Correct	26 ms	47232 KB	Output is correct
11	Correct	26 ms	47252 KB	Output is correct
12	Correct	26 ms	47308 KB	Output is correct
13	Correct	26 ms	47248 KB	Output is correct
14	Correct	27 ms	47308 KB	Output is correct
15	Correct	27 ms	47240 KB	Output is correct
16	Correct	26 ms	47244 KB	Output is correct
17	Correct	26 ms	47288 KB	Output is correct
18	Correct	26 ms	47308 KB	Output is correct
19	Correct	26 ms	47252 KB	Output is correct
20	Correct	26 ms	47260 KB	Output is correct
21	Correct	27 ms	47292 KB	Output is correct
22	Correct	26 ms	47296 KB	Output is correct
23	Correct	27 ms	47452 KB	Output is correct
24	Correct	26 ms	47436 KB	Output is correct
25	Correct	26 ms	47412 KB	Output is correct
26	Correct	26 ms	47388 KB	Output is correct
27	Correct	28 ms	47428 KB	Output is correct
28	Correct	27 ms	47396 KB	Output is correct
29	Correct	28 ms	47624 KB	Output is correct
30	Correct	26 ms	47384 KB	Output is correct
31	Correct	26 ms	47428 KB	Output is correct
32	Correct	26 ms	47436 KB	Output is correct
33	Correct	27 ms	47436 KB	Output is correct
34	Correct	27 ms	47380 KB	Output is correct
35	Correct	28 ms	47504 KB	Output is correct

Subtask #4

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	25 ms	47308 KB	Output is correct
2	Correct	44 ms	50716 KB	Output is correct
3	Correct	40 ms	50312 KB	Output is correct
4	Correct	49 ms	52576 KB	Output is correct
5	Correct	43 ms	53696 KB	Output is correct
6	Correct	43 ms	53836 KB	Output is correct
7	Correct	39 ms	50240 KB	Output is correct
8	Correct	39 ms	49864 KB	Output is correct
9	Correct	44 ms	56052 KB	Output is correct
10	Correct	39 ms	49764 KB	Output is correct

Subtask #5

25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	25 ms	47308 KB	Output is correct
2	Correct	26 ms	47292 KB	Output is correct
3	Correct	26 ms	47312 KB	Output is correct
4	Correct	26 ms	47304 KB	Output is correct
5	Correct	27 ms	47308 KB	Output is correct
6	Correct	25 ms	47308 KB	Output is correct
7	Correct	25 ms	47324 KB	Output is correct
8	Correct	25 ms	47292 KB	Output is correct
9	Correct	25 ms	47288 KB	Output is correct
10	Correct	26 ms	47232 KB	Output is correct
11	Correct	26 ms	47252 KB	Output is correct
12	Correct	26 ms	47308 KB	Output is correct
13	Correct	26 ms	47248 KB	Output is correct
14	Correct	27 ms	47308 KB	Output is correct
15	Correct	27 ms	47240 KB	Output is correct
16	Correct	26 ms	47244 KB	Output is correct
17	Correct	26 ms	47288 KB	Output is correct
18	Correct	26 ms	47308 KB	Output is correct
19	Correct	26 ms	47252 KB	Output is correct
20	Correct	26 ms	47260 KB	Output is correct
21	Correct	27 ms	47292 KB	Output is correct
22	Correct	26 ms	47296 KB	Output is correct
23	Correct	27 ms	47452 KB	Output is correct
24	Correct	26 ms	47436 KB	Output is correct
25	Correct	26 ms	47412 KB	Output is correct
26	Correct	26 ms	47388 KB	Output is correct
27	Correct	28 ms	47428 KB	Output is correct
28	Correct	27 ms	47396 KB	Output is correct
29	Correct	28 ms	47624 KB	Output is correct
30	Correct	26 ms	47384 KB	Output is correct
31	Correct	26 ms	47428 KB	Output is correct
32	Correct	26 ms	47436 KB	Output is correct
33	Correct	27 ms	47436 KB	Output is correct
34	Correct	27 ms	47380 KB	Output is correct
35	Correct	28 ms	47504 KB	Output is correct
36	Correct	25 ms	47308 KB	Output is correct
37	Correct	44 ms	50716 KB	Output is correct
38	Correct	40 ms	50312 KB	Output is correct
39	Correct	49 ms	52576 KB	Output is correct
40	Correct	43 ms	53696 KB	Output is correct
41	Correct	43 ms	53836 KB	Output is correct
42	Correct	39 ms	50240 KB	Output is correct
43	Correct	39 ms	49864 KB	Output is correct
44	Correct	44 ms	56052 KB	Output is correct
45	Correct	39 ms	49764 KB	Output is correct
46	Correct	27 ms	47172 KB	Output is correct
47	Correct	27 ms	47320 KB	Output is correct
48	Correct	26 ms	47300 KB	Output is correct
49	Correct	25 ms	47264 KB	Output is correct
50	Correct	30 ms	47276 KB	Output is correct
51	Correct	26 ms	47268 KB	Output is correct
52	Correct	26 ms	47280 KB	Output is correct
53	Correct	26 ms	47296 KB	Output is correct
54	Correct	26 ms	47216 KB	Output is correct
55	Correct	26 ms	47296 KB	Output is correct
56	Correct	26 ms	47292 KB	Output is correct
57	Correct	29 ms	47564 KB	Output is correct
58	Correct	27 ms	47404 KB	Output is correct
59	Correct	27 ms	47376 KB	Output is correct
60	Correct	26 ms	47436 KB	Output is correct
61	Correct	27 ms	47384 KB	Output is correct
62	Correct	27 ms	47420 KB	Output is correct
63	Correct	28 ms	47388 KB	Output is correct
64	Correct	27 ms	47436 KB	Output is correct
65	Correct	27 ms	47436 KB	Output is correct
66	Correct	27 ms	47372 KB	Output is correct
67	Correct	27 ms	47428 KB	Output is correct
68	Correct	28 ms	47432 KB	Output is correct
69	Correct	27 ms	47436 KB	Output is correct
70	Correct	26 ms	47308 KB	Output is correct
71	Correct	41 ms	50616 KB	Output is correct
72	Correct	40 ms	50380 KB	Output is correct
73	Correct	41 ms	52472 KB	Output is correct
74	Correct	43 ms	53656 KB	Output is correct
75	Correct	42 ms	53840 KB	Output is correct
76	Correct	38 ms	50244 KB	Output is correct
77	Correct	38 ms	49856 KB	Output is correct
78	Correct	43 ms	55992 KB	Output is correct
79	Correct	37 ms	49656 KB	Output is correct
80	Correct	44 ms	50476 KB	Output is correct
81	Correct	41 ms	50628 KB	Output is correct
82	Correct	42 ms	50312 KB	Output is correct
83	Correct	43 ms	51392 KB	Output is correct
84	Correct	40 ms	50084 KB	Output is correct
85	Correct	45 ms	54144 KB	Output is correct
86	Correct	42 ms	51144 KB	Output is correct
87	Correct	39 ms	49732 KB	Output is correct
88	Correct	42 ms	54560 KB	Output is correct
89	Correct	45 ms	55620 KB	Output is correct
90	Correct	41 ms	53700 KB	Output is correct

Subtask #6

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	25 ms	47308 KB	Output is correct
2	Correct	26 ms	47292 KB	Output is correct
3	Correct	26 ms	47312 KB	Output is correct
4	Correct	26 ms	47304 KB	Output is correct
5	Correct	27 ms	47308 KB	Output is correct
6	Correct	25 ms	47308 KB	Output is correct
7	Correct	25 ms	47324 KB	Output is correct
8	Correct	25 ms	47292 KB	Output is correct
9	Correct	25 ms	47288 KB	Output is correct
10	Correct	26 ms	47232 KB	Output is correct
11	Correct	26 ms	47252 KB	Output is correct
12	Correct	30 ms	47308 KB	Output is correct
13	Correct	121 ms	66520 KB	Output is correct
14	Correct	119 ms	64176 KB	Output is correct
15	Correct	126 ms	67352 KB	Output is correct
16	Correct	111 ms	66372 KB	Output is correct
17	Correct	112 ms	66312 KB	Output is correct
18	Correct	152 ms	105928 KB	Output is correct
19	Correct	116 ms	68744 KB	Output is correct
20	Correct	26 ms	47308 KB	Output is correct
21	Correct	26 ms	47248 KB	Output is correct
22	Correct	27 ms	47308 KB	Output is correct
23	Correct	27 ms	47240 KB	Output is correct
24	Correct	26 ms	47244 KB	Output is correct
25	Correct	26 ms	47288 KB	Output is correct
26	Correct	26 ms	47308 KB	Output is correct
27	Correct	26 ms	47252 KB	Output is correct
28	Correct	26 ms	47260 KB	Output is correct
29	Correct	27 ms	47292 KB	Output is correct
30	Correct	26 ms	47296 KB	Output is correct
31	Correct	27 ms	47452 KB	Output is correct
32	Correct	26 ms	47436 KB	Output is correct
33	Correct	26 ms	47412 KB	Output is correct
34	Correct	26 ms	47388 KB	Output is correct
35	Correct	28 ms	47428 KB	Output is correct
36	Correct	27 ms	47396 KB	Output is correct
37	Correct	28 ms	47624 KB	Output is correct
38	Correct	26 ms	47384 KB	Output is correct
39	Correct	26 ms	47428 KB	Output is correct
40	Correct	26 ms	47436 KB	Output is correct
41	Correct	27 ms	47436 KB	Output is correct
42	Correct	27 ms	47380 KB	Output is correct
43	Correct	28 ms	47504 KB	Output is correct
44	Correct	25 ms	47308 KB	Output is correct
45	Correct	44 ms	50716 KB	Output is correct
46	Correct	40 ms	50312 KB	Output is correct
47	Correct	49 ms	52576 KB	Output is correct
48	Correct	43 ms	53696 KB	Output is correct
49	Correct	43 ms	53836 KB	Output is correct
50	Correct	39 ms	50240 KB	Output is correct
51	Correct	39 ms	49864 KB	Output is correct
52	Correct	44 ms	56052 KB	Output is correct
53	Correct	39 ms	49764 KB	Output is correct
54	Correct	27 ms	47172 KB	Output is correct
55	Correct	27 ms	47320 KB	Output is correct
56	Correct	26 ms	47300 KB	Output is correct
57	Correct	25 ms	47264 KB	Output is correct
58	Correct	30 ms	47276 KB	Output is correct
59	Correct	26 ms	47268 KB	Output is correct
60	Correct	26 ms	47280 KB	Output is correct
61	Correct	26 ms	47296 KB	Output is correct
62	Correct	26 ms	47216 KB	Output is correct
63	Correct	26 ms	47296 KB	Output is correct
64	Correct	26 ms	47292 KB	Output is correct
65	Correct	29 ms	47564 KB	Output is correct
66	Correct	27 ms	47404 KB	Output is correct
67	Correct	27 ms	47376 KB	Output is correct
68	Correct	26 ms	47436 KB	Output is correct
69	Correct	27 ms	47384 KB	Output is correct
70	Correct	27 ms	47420 KB	Output is correct
71	Correct	28 ms	47388 KB	Output is correct
72	Correct	27 ms	47436 KB	Output is correct
73	Correct	27 ms	47436 KB	Output is correct
74	Correct	27 ms	47372 KB	Output is correct
75	Correct	27 ms	47428 KB	Output is correct
76	Correct	28 ms	47432 KB	Output is correct
77	Correct	27 ms	47436 KB	Output is correct
78	Correct	26 ms	47308 KB	Output is correct
79	Correct	41 ms	50616 KB	Output is correct
80	Correct	40 ms	50380 KB	Output is correct
81	Correct	41 ms	52472 KB	Output is correct
82	Correct	43 ms	53656 KB	Output is correct
83	Correct	42 ms	53840 KB	Output is correct
84	Correct	38 ms	50244 KB	Output is correct
85	Correct	38 ms	49856 KB	Output is correct
86	Correct	43 ms	55992 KB	Output is correct
87	Correct	37 ms	49656 KB	Output is correct
88	Correct	44 ms	50476 KB	Output is correct
89	Correct	41 ms	50628 KB	Output is correct
90	Correct	42 ms	50312 KB	Output is correct
91	Correct	43 ms	51392 KB	Output is correct
92	Correct	40 ms	50084 KB	Output is correct
93	Correct	45 ms	54144 KB	Output is correct
94	Correct	42 ms	51144 KB	Output is correct
95	Correct	39 ms	49732 KB	Output is correct
96	Correct	42 ms	54560 KB	Output is correct
97	Correct	45 ms	55620 KB	Output is correct
98	Correct	41 ms	53700 KB	Output is correct
99	Correct	26 ms	47308 KB	Output is correct
100	Correct	26 ms	47204 KB	Output is correct
101	Correct	26 ms	47296 KB	Output is correct
102	Correct	26 ms	47308 KB	Output is correct
103	Correct	26 ms	47300 KB	Output is correct
104	Correct	25 ms	47292 KB	Output is correct
105	Correct	26 ms	47216 KB	Output is correct
106	Correct	26 ms	47324 KB	Output is correct
107	Correct	26 ms	47236 KB	Output is correct
108	Correct	26 ms	47212 KB	Output is correct
109	Correct	26 ms	47296 KB	Output is correct
110	Correct	26 ms	47296 KB	Output is correct
111	Correct	130 ms	66532 KB	Output is correct
112	Correct	115 ms	64188 KB	Output is correct
113	Correct	116 ms	67344 KB	Output is correct
114	Correct	109 ms	66400 KB	Output is correct
115	Correct	109 ms	66368 KB	Output is correct
116	Correct	151 ms	105952 KB	Output is correct
117	Correct	116 ms	68688 KB	Output is correct
118	Correct	29 ms	47428 KB	Output is correct
119	Correct	27 ms	47352 KB	Output is correct
120	Correct	28 ms	47416 KB	Output is correct
121	Correct	27 ms	47416 KB	Output is correct
122	Correct	27 ms	47360 KB	Output is correct
123	Correct	27 ms	47432 KB	Output is correct
124	Correct	27 ms	47408 KB	Output is correct
125	Correct	27 ms	47556 KB	Output is correct
126	Correct	26 ms	47456 KB	Output is correct
127	Correct	27 ms	47300 KB	Output is correct
128	Correct	27 ms	47336 KB	Output is correct
129	Correct	27 ms	47360 KB	Output is correct
130	Correct	27 ms	47476 KB	Output is correct
131	Correct	26 ms	47308 KB	Output is correct
132	Correct	41 ms	50660 KB	Output is correct
133	Correct	40 ms	50292 KB	Output is correct
134	Correct	47 ms	52504 KB	Output is correct
135	Correct	44 ms	53704 KB	Output is correct
136	Correct	42 ms	53824 KB	Output is correct
137	Correct	38 ms	50208 KB	Output is correct
138	Correct	38 ms	49924 KB	Output is correct
139	Correct	45 ms	55948 KB	Output is correct
140	Correct	37 ms	49740 KB	Output is correct
141	Correct	41 ms	50256 KB	Output is correct
142	Correct	42 ms	50636 KB	Output is correct
143	Correct	41 ms	50276 KB	Output is correct
144	Correct	42 ms	51360 KB	Output is correct
145	Correct	39 ms	50116 KB	Output is correct
146	Correct	43 ms	54084 KB	Output is correct
147	Correct	42 ms	51136 KB	Output is correct
148	Correct	40 ms	49704 KB	Output is correct
149	Correct	44 ms	54640 KB	Output is correct
150	Correct	43 ms	55580 KB	Output is correct
151	Correct	42 ms	53700 KB	Output is correct
152	Correct	403 ms	124024 KB	Output is correct
153	Correct	424 ms	125004 KB	Output is correct
154	Correct	402 ms	118380 KB	Output is correct
155	Correct	431 ms	155248 KB	Output is correct
156	Correct	391 ms	126336 KB	Output is correct
157	Correct	372 ms	104752 KB	Output is correct
158	Correct	407 ms	136168 KB	Output is correct
159	Correct	533 ms	219248 KB	Output is correct
160	Correct	552 ms	211812 KB	Output is correct
161	Correct	385 ms	104756 KB	Output is correct
162	Correct	371 ms	109064 KB	Output is correct