oj.uz

Submission #1010535

# Submission time Handle Problem Language Result Execution time Memory
1010535 2024-06-29T07:54:21 Z ttamx Soccer Stadium (IOI23_soccer) C++17
100 / 100
 455 ms 167508 KB 
#include "soccer.h"
#include <bits/stdc++.h>

using namespace std;

const int N=2005;

int n;
int a[N][N];
int top[N][N],bot[N][N],pre[N][N][2],dp[N][N];
vector<pair<int,int>> rect[N];
int ans;

int biggest_stadium(int _n,vector<vector<int>> _a){
    n=_n;
    for(int i=1;i<=n;i++)for(int j=1;j<=n;j++)a[i][j]=_a[i-1][j-1]^1;
    for(int i=1;i<=n;i++)for(int j=1;j<=n;j++)top[i][j]=a[i][j]?a[i-1][j]?top[i-1][j]:i:top[i-1][j];
    for(int i=1;i<=n;i++)bot[n+1][i]=n+1;
    for(int i=n;i>=1;i--)for(int j=1;j<=n;j++)bot[i][j]=a[i][j]?a[i+1][j]?bot[i+1][j]:i:bot[i+1][j];
    for(int i=1;i<=n;i++){
        int t=0,b=n+1;
        for(int j=1;j<=n;j++){
            for(int x=0;x<2;x++)pre[i][j][x]=a[i][j]==x?j:pre[i][j-1][x];
            if(a[i][j]){
                if(a[i][j-1]){
                    top[i][j]=max(top[i][j],top[i][j-1]);
                    bot[i][j]=min(bot[i][j],bot[i][j-1]);
                }
                rect[j-pre[i][j][0]].emplace_back(i,j);
            }
        }
    }
    for(int w=n;w>=1;w--)for(auto [i,j]:rect[w]){
        int l=pre[i][j][0]+1,r=j,t=top[i][j],b=bot[i][j];
        if(a[i][j+1]&&top[i][j+1]<=t&&bot[i][j+1]>=b)continue;
        int lw=l>1?bot[i][l-1]+1:i+1;
        if(lw<=b){
            dp[lw][j]=max(dp[lw][j],dp[i][j]);
            continue;
        }
        int h=b-t+1;
        int res=w*h+dp[i][j];
        ans=max(ans,res);
        if(t>1){
            for(int nr=pre[t-1][r][1],nl;nr>=l;nr=pre[t-1][nl][1]){
                nl=max(l-1,pre[t-1][nr][0]);
                int p=nl>=l?t-1:i;
                dp[p][nr]=max(dp[p][nr],res-(nr-nl)*h);
            }
        }
        if(b<n){
            for(int nr=pre[b+1][r][1],nl;nr>=l;nr=pre[b+1][nl][1]){
                nl=max(l-1,pre[b+1][nr][0]);
                int p=nl>=l?b+1:i;
                dp[p][nr]=max(dp[p][nr],res-(nr-nl)*h);
            }
        }
    }
    return ans;
}

Compilation message

soccer.cpp: In function 'int biggest_stadium(int, std::vector<std::vector<int> >)':
soccer.cpp:21:13: warning: unused variable 't' [-Wunused-variable]
   21 |         int t=0,b=n+1;
      |             ^
soccer.cpp:21:17: warning: unused variable 'b' [-Wunused-variable]
   21 |         int t=0,b=n+1;
      |                 ^

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB ok

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 604 KB ok
4 Correct 0 ms 604 KB ok
5 Correct 0 ms 348 KB ok
6 Correct 0 ms 348 KB ok
7 Correct 1 ms 2908 KB ok
8 Correct 22 ms 19928 KB ok
9 Correct 321 ms 156756 KB ok

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 344 KB ok
4 Correct 0 ms 348 KB ok
5 Correct 0 ms 348 KB ok
6 Correct 0 ms 348 KB ok
7 Correct 0 ms 348 KB ok
8 Correct 0 ms 348 KB ok
9 Correct 0 ms 348 KB ok
10 Correct 0 ms 348 KB ok
11 Correct 0 ms 348 KB ok
12 Correct 0 ms 348 KB ok
13 Correct 0 ms 348 KB ok

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 0 ms 344 KB ok
5 Correct 0 ms 348 KB ok
6 Correct 0 ms 348 KB ok
7 Correct 0 ms 348 KB ok
8 Correct 0 ms 348 KB ok
9 Correct 0 ms 348 KB ok
10 Correct 0 ms 348 KB ok
11 Correct 0 ms 348 KB ok
12 Correct 0 ms 348 KB ok
13 Correct 0 ms 348 KB ok
14 Correct 0 ms 348 KB ok
15 Correct 1 ms 604 KB ok
16 Correct 0 ms 600 KB ok
17 Correct 0 ms 604 KB ok
18 Correct 1 ms 604 KB ok
19 Correct 0 ms 604 KB ok
20 Correct 0 ms 604 KB ok
21 Correct 1 ms 600 KB ok
22 Correct 0 ms 604 KB ok
23 Correct 0 ms 604 KB ok
24 Correct 1 ms 604 KB ok
25 Correct 1 ms 604 KB ok
26 Correct 0 ms 604 KB ok

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 0 ms 604 KB ok
5 Correct 0 ms 604 KB ok
6 Correct 0 ms 344 KB ok
7 Correct 0 ms 348 KB ok
8 Correct 0 ms 348 KB ok
9 Correct 0 ms 348 KB ok
10 Correct 0 ms 348 KB ok
11 Correct 0 ms 348 KB ok
12 Correct 0 ms 348 KB ok
13 Correct 0 ms 348 KB ok
14 Correct 0 ms 348 KB ok
15 Correct 0 ms 348 KB ok
16 Correct 0 ms 348 KB ok
17 Correct 1 ms 604 KB ok
18 Correct 0 ms 600 KB ok
19 Correct 0 ms 604 KB ok
20 Correct 1 ms 604 KB ok
21 Correct 0 ms 604 KB ok
22 Correct 0 ms 604 KB ok
23 Correct 1 ms 600 KB ok
24 Correct 0 ms 604 KB ok
25 Correct 0 ms 604 KB ok
26 Correct 1 ms 604 KB ok
27 Correct 1 ms 604 KB ok
28 Correct 0 ms 604 KB ok
29 Correct 0 ms 604 KB ok
30 Correct 1 ms 1116 KB ok
31 Correct 1 ms 1116 KB ok
32 Correct 0 ms 1116 KB ok
33 Correct 1 ms 860 KB ok
34 Correct 1 ms 860 KB ok
35 Correct 1 ms 860 KB ok
36 Correct 0 ms 860 KB ok
37 Correct 1 ms 860 KB ok
38 Correct 0 ms 860 KB ok
39 Correct 1 ms 860 KB ok
40 Correct 1 ms 1116 KB ok
41 Correct 1 ms 1112 KB ok

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 0 ms 604 KB ok
5 Correct 0 ms 604 KB ok
6 Correct 0 ms 344 KB ok
7 Correct 0 ms 348 KB ok
8 Correct 0 ms 348 KB ok
9 Correct 0 ms 348 KB ok
10 Correct 0 ms 348 KB ok
11 Correct 0 ms 348 KB ok
12 Correct 0 ms 348 KB ok
13 Correct 0 ms 348 KB ok
14 Correct 0 ms 348 KB ok
15 Correct 0 ms 348 KB ok
16 Correct 0 ms 348 KB ok
17 Correct 1 ms 604 KB ok
18 Correct 0 ms 600 KB ok
19 Correct 0 ms 604 KB ok
20 Correct 1 ms 604 KB ok
21 Correct 0 ms 604 KB ok
22 Correct 0 ms 604 KB ok
23 Correct 1 ms 600 KB ok
24 Correct 0 ms 604 KB ok
25 Correct 0 ms 604 KB ok
26 Correct 1 ms 604 KB ok
27 Correct 1 ms 604 KB ok
28 Correct 0 ms 604 KB ok
29 Correct 0 ms 604 KB ok
30 Correct 1 ms 1116 KB ok
31 Correct 1 ms 1116 KB ok
32 Correct 0 ms 1116 KB ok
33 Correct 1 ms 860 KB ok
34 Correct 1 ms 860 KB ok
35 Correct 1 ms 860 KB ok
36 Correct 0 ms 860 KB ok
37 Correct 1 ms 860 KB ok
38 Correct 0 ms 860 KB ok
39 Correct 1 ms 860 KB ok
40 Correct 1 ms 1116 KB ok
41 Correct 1 ms 1112 KB ok
42 Correct 23 ms 20364 KB ok
43 Correct 24 ms 20172 KB ok
44 Correct 20 ms 20828 KB ok
45 Correct 24 ms 20828 KB ok
46 Correct 24 ms 20828 KB ok
47 Correct 22 ms 20312 KB ok
48 Correct 20 ms 18012 KB ok
49 Correct 20 ms 17880 KB ok
50 Correct 21 ms 18264 KB ok
51 Correct 24 ms 20684 KB ok
52 Correct 18 ms 16592 KB ok
53 Correct 17 ms 15964 KB ok
54 Correct 18 ms 16732 KB ok
55 Correct 19 ms 17244 KB ok
56 Correct 20 ms 17496 KB ok
57 Correct 24 ms 20828 KB ok
58 Correct 26 ms 20644 KB ok
59 Correct 24 ms 20828 KB ok

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 0 ms 604 KB ok
5 Correct 0 ms 604 KB ok
6 Correct 0 ms 348 KB ok
7 Correct 0 ms 348 KB ok
8 Correct 1 ms 2908 KB ok
9 Correct 22 ms 19928 KB ok
10 Correct 321 ms 156756 KB ok
11 Correct 0 ms 344 KB ok
12 Correct 0 ms 348 KB ok
13 Correct 0 ms 348 KB ok
14 Correct 0 ms 348 KB ok
15 Correct 0 ms 348 KB ok
16 Correct 0 ms 348 KB ok
17 Correct 0 ms 348 KB ok
18 Correct 0 ms 348 KB ok
19 Correct 0 ms 348 KB ok
20 Correct 0 ms 348 KB ok
21 Correct 0 ms 348 KB ok
22 Correct 1 ms 604 KB ok
23 Correct 0 ms 600 KB ok
24 Correct 0 ms 604 KB ok
25 Correct 1 ms 604 KB ok
26 Correct 0 ms 604 KB ok
27 Correct 0 ms 604 KB ok
28 Correct 1 ms 600 KB ok
29 Correct 0 ms 604 KB ok
30 Correct 0 ms 604 KB ok
31 Correct 1 ms 604 KB ok
32 Correct 1 ms 604 KB ok
33 Correct 0 ms 604 KB ok
34 Correct 0 ms 604 KB ok
35 Correct 1 ms 1116 KB ok
36 Correct 1 ms 1116 KB ok
37 Correct 0 ms 1116 KB ok
38 Correct 1 ms 860 KB ok
39 Correct 1 ms 860 KB ok
40 Correct 1 ms 860 KB ok
41 Correct 0 ms 860 KB ok
42 Correct 1 ms 860 KB ok
43 Correct 0 ms 860 KB ok
44 Correct 1 ms 860 KB ok
45 Correct 1 ms 1116 KB ok
46 Correct 1 ms 1112 KB ok
47 Correct 23 ms 20364 KB ok
48 Correct 24 ms 20172 KB ok
49 Correct 20 ms 20828 KB ok
50 Correct 24 ms 20828 KB ok
51 Correct 24 ms 20828 KB ok
52 Correct 22 ms 20312 KB ok
53 Correct 20 ms 18012 KB ok
54 Correct 20 ms 17880 KB ok
55 Correct 21 ms 18264 KB ok
56 Correct 24 ms 20684 KB ok
57 Correct 18 ms 16592 KB ok
58 Correct 17 ms 15964 KB ok
59 Correct 18 ms 16732 KB ok
60 Correct 19 ms 17244 KB ok
61 Correct 20 ms 17496 KB ok
62 Correct 24 ms 20828 KB ok
63 Correct 26 ms 20644 KB ok
64 Correct 24 ms 20828 KB ok
65 Correct 455 ms 158304 KB ok
66 Correct 330 ms 136624 KB ok
67 Correct 265 ms 128964 KB ok
68 Correct 373 ms 166496 KB ok
69 Correct 375 ms 161276 KB ok
70 Correct 413 ms 160944 KB ok
71 Correct 425 ms 165688 KB ok
72 Correct 355 ms 157268 KB ok
73 Correct 303 ms 137552 KB ok
74 Correct 273 ms 137808 KB ok
75 Correct 274 ms 137296 KB ok
76 Correct 312 ms 146344 KB ok
77 Correct 304 ms 146088 KB ok
78 Correct 328 ms 164264 KB ok
79 Correct 266 ms 128192 KB ok
80 Correct 289 ms 127948 KB ok
81 Correct 242 ms 129984 KB ok
82 Correct 286 ms 135160 KB ok
83 Correct 290 ms 133248 KB ok
84 Correct 256 ms 117580 KB ok
85 Correct 231 ms 114512 KB ok
86 Correct 231 ms 120144 KB ok
87 Correct 245 ms 120916 KB ok
88 Correct 288 ms 130128 KB ok
89 Correct 330 ms 144720 KB ok
90 Correct 315 ms 137296 KB ok
91 Correct 318 ms 146772 KB ok
92 Correct 314 ms 130352 KB ok
93 Correct 260 ms 130492 KB ok
94 Correct 249 ms 129084 KB ok
95 Correct 248 ms 128568 KB ok
96 Correct 252 ms 127952 KB ok
97 Correct 277 ms 127076 KB ok
98 Correct 230 ms 119632 KB ok
99 Correct 337 ms 158700 KB ok
100 Correct 360 ms 165972 KB ok
101 Correct 352 ms 165968 KB ok
102 Correct 335 ms 166224 KB ok
103 Correct 369 ms 166224 KB ok
104 Correct 401 ms 167508 KB ok
105 Correct 389 ms 166992 KB ok
106 Correct 354 ms 166480 KB ok
107 Correct 380 ms 167248 KB ok
108 Correct 304 ms 157084 KB ok
109 Correct 330 ms 158096 KB ok