oj.uz

Submission #230117

# Submission time Handle Problem Language Result Execution time Memory
230117 2020-05-08T13:08:42 Z AMO5 Collecting Stamps 3 (JOI20_ho_t3) C++
100 / 100
 318 ms 509816 KB 
// READ & UNDERSTAND
// ll, int overflow, array bounds, memset(0)
// special cases (n=1?), n+1 (1-index)
// do smth instead of nothing & stay organized
// WRITE STUFF DOWN

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define pb push_back
#define all(x) (x).begin(), (x).end() 
#define MOD 1000000007

typedef long long ll;
typedef pair <int, int> ii;
typedef pair <ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef long double ld;

ll INF=LLONG_MAX;

int const mxn=404;

int dp[mxn][mxn][mxn][2]; //le,ri,cnt,where
int x[mxn],t[mxn],n,L;

int dist(int a, int b){
	if(a>b)swap(a,b);
	return min(b-a,L-(b-a));
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    //freopen("input.txt","r",stdin); freopen("output.txt","w",stdout);
	cin >> n >> L;
	for(int i=0; i<n; i++){
		cin >> x[i];
		x[i+n+1] = x[i];
	}
	for(int i=0; i<n; i++){
		cin >> t[i];
		t[i+n+1] = t[i];
	}
	for(int i=0; i<=2*n; i++)
		for(int j=0; j<=2*n; j++)
			for(int k=0; k<=n; k++)
				for(int l=0; l<2; l++)
					dp[i][j][k][l]=1e9+1;

	int ans = 0;
	dp[n][n][0][0]=0;
	for(int len=0; len<=n; len++){
		for(int i=n-len; i<=n; i++){
			 int j=i+len;
			 for(int k=0; k<=n; k++){
				 for(int l=0; l<2; l++){
					 if(dp[i][j][k][l]>1e9)continue;
					 int pos=(l==0?i:j);
					 ans=max(ans,k);
					 if(k==n)continue;
					 //left
					 if(i){
						 int cur=dp[i][j][k][l]+dist(x[pos],x[i-1]);
						 dp[i-1][j][k+(cur<=t[i-1])][0]=min(dp[i-1][j][k+(cur<=t[i-1])][0],cur);
					 }
					 //right
					 if(j<2*n){
						 int cur=dp[i][j][k][l]+dist(x[pos],x[j+1]);
						 dp[i][j+1][k+(cur<=t[j+1])][1]=min(dp[i][j+1][k+(cur<=t[j+1])][1],cur); 
					 }
				 }
			 }
		}
	}
	cout << ans << endl;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 5 ms 768 KB Output is correct
3 Correct 5 ms 1536 KB Output is correct
4 Correct 5 ms 896 KB Output is correct
5 Correct 5 ms 1152 KB Output is correct
6 Correct 6 ms 2432 KB Output is correct
7 Correct 5 ms 1280 KB Output is correct
8 Correct 5 ms 1792 KB Output is correct
9 Correct 5 ms 2432 KB Output is correct
10 Correct 5 ms 432 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 6 ms 2432 KB Output is correct
13 Correct 5 ms 2432 KB Output is correct
14 Correct 5 ms 1152 KB Output is correct
15 Correct 5 ms 1280 KB Output is correct
16 Correct 6 ms 2432 KB Output is correct
17 Correct 5 ms 2432 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 5 ms 768 KB Output is correct
3 Correct 5 ms 1536 KB Output is correct
4 Correct 5 ms 896 KB Output is correct
5 Correct 5 ms 1152 KB Output is correct
6 Correct 6 ms 2432 KB Output is correct
7 Correct 5 ms 1280 KB Output is correct
8 Correct 5 ms 1792 KB Output is correct
9 Correct 5 ms 2432 KB Output is correct
10 Correct 5 ms 432 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 6 ms 2432 KB Output is correct
13 Correct 5 ms 2432 KB Output is correct
14 Correct 5 ms 1152 KB Output is correct
15 Correct 5 ms 1280 KB Output is correct
16 Correct 6 ms 2432 KB Output is correct
17 Correct 5 ms 2432 KB Output is correct
18 Correct 6 ms 3072 KB Output is correct
19 Correct 5 ms 1792 KB Output is correct
20 Correct 5 ms 2432 KB Output is correct
21 Correct 6 ms 3072 KB Output is correct
22 Correct 5 ms 1536 KB Output is correct
23 Correct 6 ms 3456 KB Output is correct
24 Correct 5 ms 2688 KB Output is correct
25 Correct 6 ms 3072 KB Output is correct
26 Correct 6 ms 3072 KB Output is correct
27 Correct 5 ms 1280 KB Output is correct
28 Correct 5 ms 1536 KB Output is correct
29 Correct 6 ms 3456 KB Output is correct
30 Correct 6 ms 3456 KB Output is correct
31 Correct 6 ms 3072 KB Output is correct
32 Correct 6 ms 2688 KB Output is correct
33 Correct 6 ms 3456 KB Output is correct
34 Correct 6 ms 3456 KB Output is correct
35 Correct 6 ms 3456 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 5 ms 768 KB Output is correct
3 Correct 5 ms 1536 KB Output is correct
4 Correct 5 ms 896 KB Output is correct
5 Correct 5 ms 1152 KB Output is correct
6 Correct 6 ms 2432 KB Output is correct
7 Correct 5 ms 1280 KB Output is correct
8 Correct 5 ms 1792 KB Output is correct
9 Correct 5 ms 2432 KB Output is correct
10 Correct 5 ms 432 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 6 ms 2432 KB Output is correct
13 Correct 5 ms 2432 KB Output is correct
14 Correct 5 ms 1152 KB Output is correct
15 Correct 5 ms 1280 KB Output is correct
16 Correct 6 ms 2432 KB Output is correct
17 Correct 5 ms 2432 KB Output is correct
18 Correct 242 ms 408824 KB Output is correct
19 Correct 143 ms 247288 KB Output is correct
20 Correct 73 ms 131192 KB Output is correct
21 Correct 130 ms 233336 KB Output is correct
22 Correct 174 ms 303096 KB Output is correct
23 Correct 65 ms 111480 KB Output is correct
24 Correct 48 ms 86912 KB Output is correct
25 Correct 65 ms 109048 KB Output is correct
26 Correct 25 ms 41088 KB Output is correct
27 Correct 68 ms 113844 KB Output is correct
28 Correct 47 ms 80768 KB Output is correct
29 Correct 68 ms 116220 KB Output is correct
30 Correct 52 ms 91128 KB Output is correct
31 Correct 64 ms 109048 KB Output is correct
32 Correct 33 ms 56704 KB Output is correct
33 Correct 63 ms 109048 KB Output is correct
34 Correct 23 ms 38272 KB Output is correct
35 Correct 58 ms 106744 KB Output is correct
36 Correct 29 ms 50168 KB Output is correct
37 Correct 61 ms 113912 KB Output is correct
38 Correct 35 ms 61824 KB Output is correct
39 Correct 63 ms 118648 KB Output is correct
40 Correct 39 ms 69112 KB Output is correct
41 Correct 314 ms 504720 KB Output is correct
42 Correct 173 ms 339320 KB Output is correct
43 Correct 318 ms 504696 KB Output is correct
44 Correct 169 ms 335224 KB Output is correct
45 Correct 312 ms 504696 KB Output is correct
46 Correct 173 ms 339320 KB Output is correct

Subtask #4
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 5 ms 768 KB Output is correct
3 Correct 5 ms 1536 KB Output is correct
4 Correct 5 ms 896 KB Output is correct
5 Correct 5 ms 1152 KB Output is correct
6 Correct 6 ms 2432 KB Output is correct
7 Correct 5 ms 1280 KB Output is correct
8 Correct 5 ms 1792 KB Output is correct
9 Correct 5 ms 2432 KB Output is correct
10 Correct 5 ms 432 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 6 ms 2432 KB Output is correct
13 Correct 5 ms 2432 KB Output is correct
14 Correct 5 ms 1152 KB Output is correct
15 Correct 5 ms 1280 KB Output is correct
16 Correct 6 ms 2432 KB Output is correct
17 Correct 5 ms 2432 KB Output is correct
18 Correct 6 ms 3072 KB Output is correct
19 Correct 5 ms 1792 KB Output is correct
20 Correct 5 ms 2432 KB Output is correct
21 Correct 6 ms 3072 KB Output is correct
22 Correct 5 ms 1536 KB Output is correct
23 Correct 6 ms 3456 KB Output is correct
24 Correct 5 ms 2688 KB Output is correct
25 Correct 6 ms 3072 KB Output is correct
26 Correct 6 ms 3072 KB Output is correct
27 Correct 5 ms 1280 KB Output is correct
28 Correct 5 ms 1536 KB Output is correct
29 Correct 6 ms 3456 KB Output is correct
30 Correct 6 ms 3456 KB Output is correct
31 Correct 6 ms 3072 KB Output is correct
32 Correct 6 ms 2688 KB Output is correct
33 Correct 6 ms 3456 KB Output is correct
34 Correct 6 ms 3456 KB Output is correct
35 Correct 6 ms 3456 KB Output is correct
36 Correct 242 ms 408824 KB Output is correct
37 Correct 143 ms 247288 KB Output is correct
38 Correct 73 ms 131192 KB Output is correct
39 Correct 130 ms 233336 KB Output is correct
40 Correct 174 ms 303096 KB Output is correct
41 Correct 65 ms 111480 KB Output is correct
42 Correct 48 ms 86912 KB Output is correct
43 Correct 65 ms 109048 KB Output is correct
44 Correct 25 ms 41088 KB Output is correct
45 Correct 68 ms 113844 KB Output is correct
46 Correct 47 ms 80768 KB Output is correct
47 Correct 68 ms 116220 KB Output is correct
48 Correct 52 ms 91128 KB Output is correct
49 Correct 64 ms 109048 KB Output is correct
50 Correct 33 ms 56704 KB Output is correct
51 Correct 63 ms 109048 KB Output is correct
52 Correct 23 ms 38272 KB Output is correct
53 Correct 58 ms 106744 KB Output is correct
54 Correct 29 ms 50168 KB Output is correct
55 Correct 61 ms 113912 KB Output is correct
56 Correct 35 ms 61824 KB Output is correct
57 Correct 63 ms 118648 KB Output is correct
58 Correct 39 ms 69112 KB Output is correct
59 Correct 314 ms 504720 KB Output is correct
60 Correct 173 ms 339320 KB Output is correct
61 Correct 318 ms 504696 KB Output is correct
62 Correct 169 ms 335224 KB Output is correct
63 Correct 312 ms 504696 KB Output is correct
64 Correct 173 ms 339320 KB Output is correct
65 Correct 244 ms 455544 KB Output is correct
66 Correct 223 ms 417912 KB Output is correct
67 Correct 218 ms 399736 KB Output is correct
68 Correct 191 ms 368888 KB Output is correct
69 Correct 232 ms 450732 KB Output is correct
70 Correct 229 ms 431864 KB Output is correct
71 Correct 230 ms 436496 KB Output is correct
72 Correct 243 ms 441208 KB Output is correct
73 Correct 221 ms 408844 KB Output is correct
74 Correct 205 ms 381928 KB Output is correct
75 Correct 223 ms 422520 KB Output is correct
76 Correct 298 ms 484856 KB Output is correct
77 Correct 254 ms 484728 KB Output is correct
78 Correct 225 ms 373368 KB Output is correct
79 Correct 201 ms 386424 KB Output is correct
80 Correct 298 ms 474872 KB Output is correct
81 Correct 205 ms 390776 KB Output is correct
82 Correct 239 ms 413432 KB Output is correct
83 Correct 267 ms 504680 KB Output is correct
84 Correct 247 ms 431864 KB Output is correct
85 Correct 269 ms 470008 KB Output is correct
86 Correct 267 ms 460280 KB Output is correct
87 Correct 223 ms 422648 KB Output is correct
88 Correct 277 ms 509816 KB Output is correct
89 Correct 257 ms 509816 KB Output is correct
90 Correct 226 ms 427128 KB Output is correct
91 Correct 277 ms 509816 KB Output is correct
92 Correct 269 ms 509816 KB Output is correct
93 Correct 264 ms 499704 KB Output is correct