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Submission #399260

# Submission time Handle Problem Language Result Execution time Memory
399260 2021-05-05T13:40:34 Z LucaDantas The short shank; Redemption (BOI21_prison) C++17
100 / 100
 670 ms 141236 KB 
#include <bits/stdc++.h>
using namespace std;

constexpr int maxn = 2e6+10;

vector<int> g[maxn];

int a[maxn], add[maxn], rmv[maxn], dp[maxn], ans;

vector<int> roots, b, st;

vector<int> bfs() {
	queue<int> q;
	vector<int> ord;
	for(int x : roots)
		q.push(x);
	
	while(q.size()) {
		int u = q.front(); q.pop();
		ord.push_back(u);
		for(int v : g[u])
			q.push(v);
	}

	reverse(ord.begin(), ord.end());

	return ord;
}

int main() {
	int n, d, t; scanf("%d %d %d", &n, &d, &t);
	for(int i = 1; i <= n; i++) {
		scanf("%d", &a[i]);
		if(a[i] <= t) add[i] = min(n, i + t - a[i]), ++rmv[min(n, i + t - a[i]) + 1], ++ans;
	}
	
	for(int i = 1, atv = 0; i <= n; i++) {
		atv -= rmv[i];
		if(add[i]) {
			++atv;
			st.push_back(add[i] + n);
		}
		else {
			if(!atv) continue;
			++ans;
			while(st.size()) {
				if(st.back() > n && st.back()-n >= i) break;
				if(st.back() <= n) g[i].push_back(st.back());
				st.pop_back();
			}
			st.push_back(i);
		}
	}
	
	while(st.size()) {
		if(st.back() <= n) roots.push_back(st.back());
		st.pop_back();
	}

	vector<int> ord = bfs();
	for(int u : ord) {
		if(!g[u].size()) dp[u] = 1;
		else {
			vector<int> here;
			int mx = 0, ok = 0;
			for(int v : g[u])
				here.push_back(dp[v]), mx = max(mx, here.back());
			for(int x : here)
				if(x == mx && !ok) ok = 1;
				else b.push_back(x);
			dp[u] = mx+1;
		}
	}

	for(int x : roots)
		b.push_back(dp[x]);

	sort(b.begin(), b.end());
	while(d-- && b.size())
		ans -= b.back(), b.pop_back();
	printf("%d\n", ans);
}

Compilation message

prison.cpp: In function 'int main()':
prison.cpp:31:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |  int n, d, t; scanf("%d %d %d", &n, &d, &t);
      |               ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
prison.cpp:33:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   33 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 47180 KB Output is correct
2 Correct 30 ms 47308 KB Output is correct
3 Correct 31 ms 47308 KB Output is correct
4 Correct 30 ms 47240 KB Output is correct
5 Correct 29 ms 47300 KB Output is correct
6 Correct 30 ms 47436 KB Output is correct
7 Correct 29 ms 47212 KB Output is correct
8 Correct 30 ms 47252 KB Output is correct
9 Correct 32 ms 47308 KB Output is correct
10 Correct 29 ms 47232 KB Output is correct
11 Correct 28 ms 47248 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 47244 KB Output is correct
2 Correct 151 ms 68372 KB Output is correct
3 Correct 126 ms 64576 KB Output is correct
4 Correct 138 ms 65556 KB Output is correct
5 Correct 190 ms 67496 KB Output is correct
6 Correct 124 ms 63808 KB Output is correct
7 Correct 146 ms 73396 KB Output is correct
8 Correct 134 ms 66404 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 47180 KB Output is correct
2 Correct 30 ms 47308 KB Output is correct
3 Correct 31 ms 47308 KB Output is correct
4 Correct 30 ms 47240 KB Output is correct
5 Correct 29 ms 47300 KB Output is correct
6 Correct 30 ms 47436 KB Output is correct
7 Correct 29 ms 47212 KB Output is correct
8 Correct 30 ms 47252 KB Output is correct
9 Correct 32 ms 47308 KB Output is correct
10 Correct 29 ms 47232 KB Output is correct
11 Correct 28 ms 47248 KB Output is correct
12 Correct 31 ms 47276 KB Output is correct
13 Correct 30 ms 47308 KB Output is correct
14 Correct 30 ms 47236 KB Output is correct
15 Correct 30 ms 47276 KB Output is correct
16 Correct 31 ms 47300 KB Output is correct
17 Correct 31 ms 47272 KB Output is correct
18 Correct 30 ms 47284 KB Output is correct
19 Correct 29 ms 47232 KB Output is correct
20 Correct 29 ms 47300 KB Output is correct
21 Correct 30 ms 47208 KB Output is correct
22 Correct 31 ms 47308 KB Output is correct
23 Correct 31 ms 47404 KB Output is correct
24 Correct 33 ms 47436 KB Output is correct
25 Correct 31 ms 47412 KB Output is correct
26 Correct 30 ms 47436 KB Output is correct
27 Correct 31 ms 47428 KB Output is correct
28 Correct 31 ms 47436 KB Output is correct
29 Correct 31 ms 47340 KB Output is correct
30 Correct 32 ms 47344 KB Output is correct
31 Correct 30 ms 47352 KB Output is correct
32 Correct 30 ms 47440 KB Output is correct
33 Correct 30 ms 47436 KB Output is correct
34 Correct 31 ms 47436 KB Output is correct
35 Correct 31 ms 47428 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 47264 KB Output is correct
2 Correct 47 ms 50452 KB Output is correct
3 Correct 46 ms 50396 KB Output is correct
4 Correct 46 ms 50260 KB Output is correct
5 Correct 47 ms 50780 KB Output is correct
6 Correct 47 ms 50932 KB Output is correct
7 Correct 43 ms 49676 KB Output is correct
8 Correct 45 ms 49476 KB Output is correct
9 Correct 48 ms 51140 KB Output is correct
10 Correct 42 ms 50012 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 47180 KB Output is correct
2 Correct 30 ms 47308 KB Output is correct
3 Correct 31 ms 47308 KB Output is correct
4 Correct 30 ms 47240 KB Output is correct
5 Correct 29 ms 47300 KB Output is correct
6 Correct 30 ms 47436 KB Output is correct
7 Correct 29 ms 47212 KB Output is correct
8 Correct 30 ms 47252 KB Output is correct
9 Correct 32 ms 47308 KB Output is correct
10 Correct 29 ms 47232 KB Output is correct
11 Correct 28 ms 47248 KB Output is correct
12 Correct 31 ms 47276 KB Output is correct
13 Correct 30 ms 47308 KB Output is correct
14 Correct 30 ms 47236 KB Output is correct
15 Correct 30 ms 47276 KB Output is correct
16 Correct 31 ms 47300 KB Output is correct
17 Correct 31 ms 47272 KB Output is correct
18 Correct 30 ms 47284 KB Output is correct
19 Correct 29 ms 47232 KB Output is correct
20 Correct 29 ms 47300 KB Output is correct
21 Correct 30 ms 47208 KB Output is correct
22 Correct 31 ms 47308 KB Output is correct
23 Correct 31 ms 47404 KB Output is correct
24 Correct 33 ms 47436 KB Output is correct
25 Correct 31 ms 47412 KB Output is correct
26 Correct 30 ms 47436 KB Output is correct
27 Correct 31 ms 47428 KB Output is correct
28 Correct 31 ms 47436 KB Output is correct
29 Correct 31 ms 47340 KB Output is correct
30 Correct 32 ms 47344 KB Output is correct
31 Correct 30 ms 47352 KB Output is correct
32 Correct 30 ms 47440 KB Output is correct
33 Correct 30 ms 47436 KB Output is correct
34 Correct 31 ms 47436 KB Output is correct
35 Correct 31 ms 47428 KB Output is correct
36 Correct 31 ms 47264 KB Output is correct
37 Correct 47 ms 50452 KB Output is correct
38 Correct 46 ms 50396 KB Output is correct
39 Correct 46 ms 50260 KB Output is correct
40 Correct 47 ms 50780 KB Output is correct
41 Correct 47 ms 50932 KB Output is correct
42 Correct 43 ms 49676 KB Output is correct
43 Correct 45 ms 49476 KB Output is correct
44 Correct 48 ms 51140 KB Output is correct
45 Correct 42 ms 50012 KB Output is correct
46 Correct 31 ms 47296 KB Output is correct
47 Correct 32 ms 47288 KB Output is correct
48 Correct 31 ms 47272 KB Output is correct
49 Correct 29 ms 47312 KB Output is correct
50 Correct 30 ms 47304 KB Output is correct
51 Correct 30 ms 47300 KB Output is correct
52 Correct 31 ms 47372 KB Output is correct
53 Correct 31 ms 47256 KB Output is correct
54 Correct 30 ms 47308 KB Output is correct
55 Correct 30 ms 47308 KB Output is correct
56 Correct 30 ms 47272 KB Output is correct
57 Correct 31 ms 47484 KB Output is correct
58 Correct 30 ms 47364 KB Output is correct
59 Correct 31 ms 47428 KB Output is correct
60 Correct 29 ms 47388 KB Output is correct
61 Correct 31 ms 47364 KB Output is correct
62 Correct 31 ms 47416 KB Output is correct
63 Correct 30 ms 47484 KB Output is correct
64 Correct 30 ms 47436 KB Output is correct
65 Correct 31 ms 47460 KB Output is correct
66 Correct 32 ms 47368 KB Output is correct
67 Correct 31 ms 47380 KB Output is correct
68 Correct 32 ms 47400 KB Output is correct
69 Correct 30 ms 47408 KB Output is correct
70 Correct 30 ms 47308 KB Output is correct
71 Correct 47 ms 50420 KB Output is correct
72 Correct 45 ms 50432 KB Output is correct
73 Correct 46 ms 50288 KB Output is correct
74 Correct 46 ms 50884 KB Output is correct
75 Correct 54 ms 50880 KB Output is correct
76 Correct 42 ms 49604 KB Output is correct
77 Correct 43 ms 49468 KB Output is correct
78 Correct 48 ms 51152 KB Output is correct
79 Correct 43 ms 49984 KB Output is correct
80 Correct 48 ms 50396 KB Output is correct
81 Correct 47 ms 50460 KB Output is correct
82 Correct 46 ms 50400 KB Output is correct
83 Correct 46 ms 50368 KB Output is correct
84 Correct 45 ms 50120 KB Output is correct
85 Correct 47 ms 51236 KB Output is correct
86 Correct 47 ms 50240 KB Output is correct
87 Correct 44 ms 49612 KB Output is correct
88 Correct 46 ms 50792 KB Output is correct
89 Correct 47 ms 51108 KB Output is correct
90 Correct 51 ms 50584 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 47180 KB Output is correct
2 Correct 30 ms 47308 KB Output is correct
3 Correct 31 ms 47308 KB Output is correct
4 Correct 30 ms 47240 KB Output is correct
5 Correct 29 ms 47300 KB Output is correct
6 Correct 30 ms 47436 KB Output is correct
7 Correct 29 ms 47212 KB Output is correct
8 Correct 30 ms 47252 KB Output is correct
9 Correct 32 ms 47308 KB Output is correct
10 Correct 29 ms 47232 KB Output is correct
11 Correct 28 ms 47248 KB Output is correct
12 Correct 30 ms 47244 KB Output is correct
13 Correct 151 ms 68372 KB Output is correct
14 Correct 126 ms 64576 KB Output is correct
15 Correct 138 ms 65556 KB Output is correct
16 Correct 190 ms 67496 KB Output is correct
17 Correct 124 ms 63808 KB Output is correct
18 Correct 146 ms 73396 KB Output is correct
19 Correct 134 ms 66404 KB Output is correct
20 Correct 31 ms 47276 KB Output is correct
21 Correct 30 ms 47308 KB Output is correct
22 Correct 30 ms 47236 KB Output is correct
23 Correct 30 ms 47276 KB Output is correct
24 Correct 31 ms 47300 KB Output is correct
25 Correct 31 ms 47272 KB Output is correct
26 Correct 30 ms 47284 KB Output is correct
27 Correct 29 ms 47232 KB Output is correct
28 Correct 29 ms 47300 KB Output is correct
29 Correct 30 ms 47208 KB Output is correct
30 Correct 31 ms 47308 KB Output is correct
31 Correct 31 ms 47404 KB Output is correct
32 Correct 33 ms 47436 KB Output is correct
33 Correct 31 ms 47412 KB Output is correct
34 Correct 30 ms 47436 KB Output is correct
35 Correct 31 ms 47428 KB Output is correct
36 Correct 31 ms 47436 KB Output is correct
37 Correct 31 ms 47340 KB Output is correct
38 Correct 32 ms 47344 KB Output is correct
39 Correct 30 ms 47352 KB Output is correct
40 Correct 30 ms 47440 KB Output is correct
41 Correct 30 ms 47436 KB Output is correct
42 Correct 31 ms 47436 KB Output is correct
43 Correct 31 ms 47428 KB Output is correct
44 Correct 31 ms 47264 KB Output is correct
45 Correct 47 ms 50452 KB Output is correct
46 Correct 46 ms 50396 KB Output is correct
47 Correct 46 ms 50260 KB Output is correct
48 Correct 47 ms 50780 KB Output is correct
49 Correct 47 ms 50932 KB Output is correct
50 Correct 43 ms 49676 KB Output is correct
51 Correct 45 ms 49476 KB Output is correct
52 Correct 48 ms 51140 KB Output is correct
53 Correct 42 ms 50012 KB Output is correct
54 Correct 31 ms 47296 KB Output is correct
55 Correct 32 ms 47288 KB Output is correct
56 Correct 31 ms 47272 KB Output is correct
57 Correct 29 ms 47312 KB Output is correct
58 Correct 30 ms 47304 KB Output is correct
59 Correct 30 ms 47300 KB Output is correct
60 Correct 31 ms 47372 KB Output is correct
61 Correct 31 ms 47256 KB Output is correct
62 Correct 30 ms 47308 KB Output is correct
63 Correct 30 ms 47308 KB Output is correct
64 Correct 30 ms 47272 KB Output is correct
65 Correct 31 ms 47484 KB Output is correct
66 Correct 30 ms 47364 KB Output is correct
67 Correct 31 ms 47428 KB Output is correct
68 Correct 29 ms 47388 KB Output is correct
69 Correct 31 ms 47364 KB Output is correct
70 Correct 31 ms 47416 KB Output is correct
71 Correct 30 ms 47484 KB Output is correct
72 Correct 30 ms 47436 KB Output is correct
73 Correct 31 ms 47460 KB Output is correct
74 Correct 32 ms 47368 KB Output is correct
75 Correct 31 ms 47380 KB Output is correct
76 Correct 32 ms 47400 KB Output is correct
77 Correct 30 ms 47408 KB Output is correct
78 Correct 30 ms 47308 KB Output is correct
79 Correct 47 ms 50420 KB Output is correct
80 Correct 45 ms 50432 KB Output is correct
81 Correct 46 ms 50288 KB Output is correct
82 Correct 46 ms 50884 KB Output is correct
83 Correct 54 ms 50880 KB Output is correct
84 Correct 42 ms 49604 KB Output is correct
85 Correct 43 ms 49468 KB Output is correct
86 Correct 48 ms 51152 KB Output is correct
87 Correct 43 ms 49984 KB Output is correct
88 Correct 48 ms 50396 KB Output is correct
89 Correct 47 ms 50460 KB Output is correct
90 Correct 46 ms 50400 KB Output is correct
91 Correct 46 ms 50368 KB Output is correct
92 Correct 45 ms 50120 KB Output is correct
93 Correct 47 ms 51236 KB Output is correct
94 Correct 47 ms 50240 KB Output is correct
95 Correct 44 ms 49612 KB Output is correct
96 Correct 46 ms 50792 KB Output is correct
97 Correct 47 ms 51108 KB Output is correct
98 Correct 51 ms 50584 KB Output is correct
99 Correct 31 ms 47288 KB Output is correct
100 Correct 30 ms 47300 KB Output is correct
101 Correct 30 ms 47264 KB Output is correct
102 Correct 29 ms 47264 KB Output is correct
103 Correct 30 ms 47308 KB Output is correct
104 Correct 30 ms 47308 KB Output is correct
105 Correct 29 ms 47300 KB Output is correct
106 Correct 30 ms 47328 KB Output is correct
107 Correct 34 ms 47252 KB Output is correct
108 Correct 34 ms 47252 KB Output is correct
109 Correct 30 ms 47300 KB Output is correct
110 Correct 30 ms 47180 KB Output is correct
111 Correct 150 ms 68364 KB Output is correct
112 Correct 127 ms 64548 KB Output is correct
113 Correct 134 ms 65616 KB Output is correct
114 Correct 167 ms 67548 KB Output is correct
115 Correct 125 ms 63792 KB Output is correct
116 Correct 145 ms 73436 KB Output is correct
117 Correct 131 ms 66500 KB Output is correct
118 Correct 31 ms 47444 KB Output is correct
119 Correct 31 ms 47384 KB Output is correct
120 Correct 32 ms 47416 KB Output is correct
121 Correct 30 ms 47480 KB Output is correct
122 Correct 30 ms 47428 KB Output is correct
123 Correct 32 ms 47376 KB Output is correct
124 Correct 31 ms 47424 KB Output is correct
125 Correct 31 ms 47432 KB Output is correct
126 Correct 30 ms 47436 KB Output is correct
127 Correct 31 ms 47356 KB Output is correct
128 Correct 31 ms 47420 KB Output is correct
129 Correct 29 ms 47440 KB Output is correct
130 Correct 31 ms 47428 KB Output is correct
131 Correct 30 ms 47212 KB Output is correct
132 Correct 47 ms 50476 KB Output is correct
133 Correct 47 ms 50396 KB Output is correct
134 Correct 46 ms 50288 KB Output is correct
135 Correct 46 ms 50760 KB Output is correct
136 Correct 46 ms 50880 KB Output is correct
137 Correct 44 ms 49616 KB Output is correct
138 Correct 45 ms 49428 KB Output is correct
139 Correct 47 ms 51140 KB Output is correct
140 Correct 43 ms 49964 KB Output is correct
141 Correct 46 ms 50412 KB Output is correct
142 Correct 47 ms 50400 KB Output is correct
143 Correct 46 ms 50408 KB Output is correct
144 Correct 46 ms 50368 KB Output is correct
145 Correct 47 ms 50264 KB Output is correct
146 Correct 48 ms 51124 KB Output is correct
147 Correct 46 ms 50200 KB Output is correct
148 Correct 43 ms 49604 KB Output is correct
149 Correct 46 ms 50752 KB Output is correct
150 Correct 47 ms 51068 KB Output is correct
151 Correct 45 ms 50588 KB Output is correct
152 Correct 523 ms 131676 KB Output is correct
153 Correct 517 ms 130020 KB Output is correct
154 Correct 475 ms 125852 KB Output is correct
155 Correct 485 ms 129952 KB Output is correct
156 Correct 670 ms 128288 KB Output is correct
157 Correct 403 ms 106152 KB Output is correct
158 Correct 444 ms 119632 KB Output is correct
159 Correct 489 ms 141236 KB Output is correct
160 Correct 516 ms 136132 KB Output is correct
161 Correct 388 ms 110256 KB Output is correct
162 Correct 408 ms 109896 KB Output is correct