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답안 #485061

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
485061 2021-11-06T01:38:09 Z socho Collecting Stamps 3 (JOI20_ho_t3) C++14
100 / 100
 127 ms 129560 KB 
#include <bits/stdc++.h>
using namespace std;
void fast() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
}
void ran() {
	srand(chrono::steady_clock::now().time_since_epoch().count());
}
long long get_rand() {
	long long a = rand();
	long long b = rand();
	return a * (RAND_MAX + 1ll) + b;
}
void usaco() {
	freopen("problem.in", "r", stdin); 
	freopen("problem.out", "w", stdout);
}
template<typename T>
using min_pq = priority_queue<T, vector<T>, greater<T>>;
#define endl '\n'
// #define double long double
#define int long long
// const int MOD = 1000 * 1000 * 1000 + 7;
// const int MOD = 998244353;
// #define cerr if(0) cerr
#define debug(x) cerr << #x << ": " << x << endl;

int n, len;
const int MXN = 205;
int pos[MXN], by[MXN];
 
int dp[MXN][MXN][2][MXN];
 
priority_queue<pair<int, pair<pair<int, int>, pair<int, int>>>, vector<pair<int, pair<pair<int, int>, pair<int, int>>>>, greater<pair<int, pair<pair<int, int>, pair<int, int>>>>> proc;
 
bool can(int l, int r) {
	if (r + 1 == l) return true;
	if (l == 1 && r == n) return true;
	return false;
}
 
int prev(int x) {
	if (x == 1) return n;
	return x - 1;
}
 
int next(int x) {
	if (x == n) return 1;
	return x + 1;
}
 
signed main() {
	
	ran(); fast();
 
	cin >> n >> len;
	for (int i=1; i<=n; i++) {
		cin >> pos[i];
	}
	for (int i=1; i<=n; i++) {
		cin >> by[i];
	}
	
	if (n == 1) {
		if (min(pos[1], len - pos[1]) <= by[1]) cout << 1 << endl;
		else cout << 0 << endl;
		return 0;
	}
	
	for (int i=1; i<=n; i++) {
		for (int j=1; j<=n; j++) {
			for (int f=0; f<2; f++) {
				for (int g=0; g<=n; g++) {
					dp[i][j][f][g] = LLONG_MAX;
				}
			}
		}
	}
	
	proc.push({pos[1], {{1, 1}, {0, pos[1] <= by[1]}}});
	proc.push({len-pos[n], {{n, n}, {1, (len - pos[n]) <= by[n]}}});
	
	dp[1][1][0][pos[1] <= by[1]] = pos[1];
	dp[n][n][1][(len - pos[n]) <= by[n]] = len - pos[n];
	int lr = 0;
	
	for (int isi=0; isi<=n; isi++) {
		for (int l=1; l<=n; l++) {
			int r = prev(((l - 1 + isi) % n) + 1);
			for (int f=0; f<2; f++) {
				for (int taken=0; taken<=n; taken++) {
					
					if (dp[l][r][f][taken] == LLONG_MAX) continue;
					
					int mtime = dp[l][r][f][taken];
					lr = max(lr, taken);
					
					int at = (f == 0 ? pos[l] : pos[r]);
					
					if (can(l, r)) continue;
					{
						int before = prev(l);
						int dist = abs(at - pos[before]);
						int will = min(dist, len - dist) + mtime;
						int ntaken = taken + (will <= by[before]);
						dp[before][r][0][ntaken] = min(will, dp[before][r][0][ntaken]);
					}
					
					{
						int after = next(r);
						int dist = abs(at - pos[after]);
						int will = min(dist, len - dist) + mtime;
						int ntaken = taken + (will <= by[after]);
						dp[l][after][1][ntaken] = min(will, dp[l][after][1][ntaken]);
					}
					
				}
			}
		}
	}
	
	cout << lr << endl;
	
 
}

Compilation message

ho_t3.cpp: In function 'void usaco()':
ho_t3.cpp:15:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |  freopen("problem.in", "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
ho_t3.cpp:16:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |  freopen("problem.out", "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 588 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 0 ms 460 KB Output is correct
8 Correct 0 ms 588 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 716 KB Output is correct
13 Correct 0 ms 716 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 0 ms 460 KB Output is correct
16 Correct 1 ms 716 KB Output is correct
17 Correct 1 ms 716 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 588 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 0 ms 460 KB Output is correct
8 Correct 0 ms 588 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 716 KB Output is correct
13 Correct 0 ms 716 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 0 ms 460 KB Output is correct
16 Correct 1 ms 716 KB Output is correct
17 Correct 1 ms 716 KB Output is correct
18 Correct 1 ms 972 KB Output is correct
19 Correct 1 ms 588 KB Output is correct
20 Correct 0 ms 716 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 588 KB Output is correct
23 Correct 1 ms 1100 KB Output is correct
24 Correct 1 ms 844 KB Output is correct
25 Correct 1 ms 972 KB Output is correct
26 Correct 1 ms 972 KB Output is correct
27 Correct 1 ms 460 KB Output is correct
28 Correct 1 ms 588 KB Output is correct
29 Correct 1 ms 1084 KB Output is correct
30 Correct 1 ms 1100 KB Output is correct
31 Correct 1 ms 972 KB Output is correct
32 Correct 1 ms 876 KB Output is correct
33 Correct 1 ms 1100 KB Output is correct
34 Correct 1 ms 1100 KB Output is correct
35 Correct 1 ms 1100 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 588 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 0 ms 460 KB Output is correct
8 Correct 0 ms 588 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 716 KB Output is correct
13 Correct 0 ms 716 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 0 ms 460 KB Output is correct
16 Correct 1 ms 716 KB Output is correct
17 Correct 1 ms 716 KB Output is correct
18 Correct 84 ms 103852 KB Output is correct
19 Correct 49 ms 62796 KB Output is correct
20 Correct 23 ms 33356 KB Output is correct
21 Correct 43 ms 59340 KB Output is correct
22 Correct 60 ms 76988 KB Output is correct
23 Correct 21 ms 28364 KB Output is correct
24 Correct 13 ms 22216 KB Output is correct
25 Correct 20 ms 27860 KB Output is correct
26 Correct 6 ms 10572 KB Output is correct
27 Correct 21 ms 29048 KB Output is correct
28 Correct 13 ms 20652 KB Output is correct
29 Correct 21 ms 29656 KB Output is correct
30 Correct 15 ms 23244 KB Output is correct
31 Correct 19 ms 27724 KB Output is correct
32 Correct 9 ms 14540 KB Output is correct
33 Correct 19 ms 27740 KB Output is correct
34 Correct 5 ms 9804 KB Output is correct
35 Correct 15 ms 27252 KB Output is correct
36 Correct 8 ms 12876 KB Output is correct
37 Correct 18 ms 29052 KB Output is correct
38 Correct 10 ms 15820 KB Output is correct
39 Correct 18 ms 30156 KB Output is correct
40 Correct 11 ms 17612 KB Output is correct
41 Correct 114 ms 128324 KB Output is correct
42 Correct 50 ms 86260 KB Output is correct
43 Correct 113 ms 128176 KB Output is correct
44 Correct 47 ms 85060 KB Output is correct
45 Correct 115 ms 128096 KB Output is correct
46 Correct 49 ms 86196 KB Output is correct

Subtask #4
75.0 / 75.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 588 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 0 ms 460 KB Output is correct
8 Correct 0 ms 588 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 716 KB Output is correct
13 Correct 0 ms 716 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 0 ms 460 KB Output is correct
16 Correct 1 ms 716 KB Output is correct
17 Correct 1 ms 716 KB Output is correct
18 Correct 1 ms 972 KB Output is correct
19 Correct 1 ms 588 KB Output is correct
20 Correct 0 ms 716 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 588 KB Output is correct
23 Correct 1 ms 1100 KB Output is correct
24 Correct 1 ms 844 KB Output is correct
25 Correct 1 ms 972 KB Output is correct
26 Correct 1 ms 972 KB Output is correct
27 Correct 1 ms 460 KB Output is correct
28 Correct 1 ms 588 KB Output is correct
29 Correct 1 ms 1084 KB Output is correct
30 Correct 1 ms 1100 KB Output is correct
31 Correct 1 ms 972 KB Output is correct
32 Correct 1 ms 876 KB Output is correct
33 Correct 1 ms 1100 KB Output is correct
34 Correct 1 ms 1100 KB Output is correct
35 Correct 1 ms 1100 KB Output is correct
36 Correct 84 ms 103852 KB Output is correct
37 Correct 49 ms 62796 KB Output is correct
38 Correct 23 ms 33356 KB Output is correct
39 Correct 43 ms 59340 KB Output is correct
40 Correct 60 ms 76988 KB Output is correct
41 Correct 21 ms 28364 KB Output is correct
42 Correct 13 ms 22216 KB Output is correct
43 Correct 20 ms 27860 KB Output is correct
44 Correct 6 ms 10572 KB Output is correct
45 Correct 21 ms 29048 KB Output is correct
46 Correct 13 ms 20652 KB Output is correct
47 Correct 21 ms 29656 KB Output is correct
48 Correct 15 ms 23244 KB Output is correct
49 Correct 19 ms 27724 KB Output is correct
50 Correct 9 ms 14540 KB Output is correct
51 Correct 19 ms 27740 KB Output is correct
52 Correct 5 ms 9804 KB Output is correct
53 Correct 15 ms 27252 KB Output is correct
54 Correct 8 ms 12876 KB Output is correct
55 Correct 18 ms 29052 KB Output is correct
56 Correct 10 ms 15820 KB Output is correct
57 Correct 18 ms 30156 KB Output is correct
58 Correct 11 ms 17612 KB Output is correct
59 Correct 114 ms 128324 KB Output is correct
60 Correct 50 ms 86260 KB Output is correct
61 Correct 113 ms 128176 KB Output is correct
62 Correct 47 ms 85060 KB Output is correct
63 Correct 115 ms 128096 KB Output is correct
64 Correct 49 ms 86196 KB Output is correct
65 Correct 98 ms 115688 KB Output is correct
66 Correct 86 ms 106144 KB Output is correct
67 Correct 83 ms 101508 KB Output is correct
68 Correct 73 ms 93624 KB Output is correct
69 Correct 95 ms 114372 KB Output is correct
70 Correct 95 ms 109660 KB Output is correct
71 Correct 87 ms 110808 KB Output is correct
72 Correct 100 ms 112028 KB Output is correct
73 Correct 73 ms 103748 KB Output is correct
74 Correct 82 ms 96948 KB Output is correct
75 Correct 85 ms 107332 KB Output is correct
76 Correct 114 ms 123184 KB Output is correct
77 Correct 101 ms 123032 KB Output is correct
78 Correct 83 ms 94840 KB Output is correct
79 Correct 81 ms 98172 KB Output is correct
80 Correct 110 ms 120564 KB Output is correct
81 Correct 78 ms 99268 KB Output is correct
82 Correct 79 ms 105052 KB Output is correct
83 Correct 117 ms 128092 KB Output is correct
84 Correct 79 ms 109632 KB Output is correct
85 Correct 89 ms 119388 KB Output is correct
86 Correct 90 ms 116924 KB Output is correct
87 Correct 90 ms 107232 KB Output is correct
88 Correct 127 ms 129560 KB Output is correct
89 Correct 113 ms 129372 KB Output is correct
90 Correct 64 ms 108496 KB Output is correct
91 Correct 125 ms 129484 KB Output is correct
92 Correct 111 ms 129468 KB Output is correct
93 Correct 75 ms 126936 KB Output is correct