oj.uz

Submission #1010540

# Submission time Handle Problem Language Result Execution time Memory
1010540 2024-06-29T07:56:18 Z ttamx Soccer Stadium (IOI23_soccer) C++17
100 / 100
 428 ms 167504 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);
        for(int x:{t-1,b+1}){
            for(int nr=pre[x][r][1],nl;nr>=l;nr=pre[x][nl][1]){
                nl=max(l-1,pre[x][nr][0]);
                int p=nl>=l?x: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 604 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 344 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 3 ms 2908 KB ok
8 Correct 24 ms 19936 KB ok
9 Correct 344 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 344 KB ok
3 Correct 0 ms 348 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 1 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 604 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 1 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 604 KB ok
16 Correct 0 ms 604 KB ok
17 Correct 0 ms 604 KB ok
18 Correct 0 ms 600 KB ok
19 Correct 0 ms 604 KB ok
20 Correct 0 ms 604 KB ok
21 Correct 1 ms 604 KB ok
22 Correct 1 ms 604 KB ok
23 Correct 0 ms 604 KB ok
24 Correct 0 ms 604 KB ok
25 Correct 0 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 604 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 344 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 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 1 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 604 KB ok
18 Correct 0 ms 604 KB ok
19 Correct 0 ms 604 KB ok
20 Correct 0 ms 600 KB ok
21 Correct 0 ms 604 KB ok
22 Correct 0 ms 604 KB ok
23 Correct 1 ms 604 KB ok
24 Correct 1 ms 604 KB ok
25 Correct 0 ms 604 KB ok
26 Correct 0 ms 604 KB ok
27 Correct 0 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 1 ms 1116 KB ok
33 Correct 1 ms 860 KB ok
34 Correct 1 ms 860 KB ok
35 Correct 1 ms 856 KB ok
36 Correct 0 ms 860 KB ok
37 Correct 0 ms 860 KB ok
38 Correct 1 ms 860 KB ok
39 Correct 1 ms 860 KB ok
40 Correct 0 ms 860 KB ok
41 Correct 1 ms 1116 KB ok

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 344 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 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 1 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 604 KB ok
18 Correct 0 ms 604 KB ok
19 Correct 0 ms 604 KB ok
20 Correct 0 ms 600 KB ok
21 Correct 0 ms 604 KB ok
22 Correct 0 ms 604 KB ok
23 Correct 1 ms 604 KB ok
24 Correct 1 ms 604 KB ok
25 Correct 0 ms 604 KB ok
26 Correct 0 ms 604 KB ok
27 Correct 0 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 1 ms 1116 KB ok
33 Correct 1 ms 860 KB ok
34 Correct 1 ms 860 KB ok
35 Correct 1 ms 856 KB ok
36 Correct 0 ms 860 KB ok
37 Correct 0 ms 860 KB ok
38 Correct 1 ms 860 KB ok
39 Correct 1 ms 860 KB ok
40 Correct 0 ms 860 KB ok
41 Correct 1 ms 1116 KB ok
42 Correct 29 ms 20488 KB ok
43 Correct 26 ms 20172 KB ok
44 Correct 24 ms 20940 KB ok
45 Correct 24 ms 20820 KB ok
46 Correct 24 ms 20824 KB ok
47 Correct 23 ms 20316 KB ok
48 Correct 17 ms 18008 KB ok
49 Correct 20 ms 17920 KB ok
50 Correct 18 ms 18340 KB ok
51 Correct 22 ms 20604 KB ok
52 Correct 16 ms 16728 KB ok
53 Correct 16 ms 15964 KB ok
54 Correct 16 ms 16860 KB ok
55 Correct 20 ms 17244 KB ok
56 Correct 18 ms 17496 KB ok
57 Correct 24 ms 20828 KB ok
58 Correct 28 ms 20736 KB ok
59 Correct 23 ms 20828 KB ok

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 344 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 3 ms 2908 KB ok
9 Correct 24 ms 19936 KB ok
10 Correct 344 ms 156756 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 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 0 ms 604 KB ok
23 Correct 0 ms 604 KB ok
24 Correct 0 ms 604 KB ok
25 Correct 0 ms 600 KB ok
26 Correct 0 ms 604 KB ok
27 Correct 0 ms 604 KB ok
28 Correct 1 ms 604 KB ok
29 Correct 1 ms 604 KB ok
30 Correct 0 ms 604 KB ok
31 Correct 0 ms 604 KB ok
32 Correct 0 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 1 ms 1116 KB ok
38 Correct 1 ms 860 KB ok
39 Correct 1 ms 860 KB ok
40 Correct 1 ms 856 KB ok
41 Correct 0 ms 860 KB ok
42 Correct 0 ms 860 KB ok
43 Correct 1 ms 860 KB ok
44 Correct 1 ms 860 KB ok
45 Correct 0 ms 860 KB ok
46 Correct 1 ms 1116 KB ok
47 Correct 29 ms 20488 KB ok
48 Correct 26 ms 20172 KB ok
49 Correct 24 ms 20940 KB ok
50 Correct 24 ms 20820 KB ok
51 Correct 24 ms 20824 KB ok
52 Correct 23 ms 20316 KB ok
53 Correct 17 ms 18008 KB ok
54 Correct 20 ms 17920 KB ok
55 Correct 18 ms 18340 KB ok
56 Correct 22 ms 20604 KB ok
57 Correct 16 ms 16728 KB ok
58 Correct 16 ms 15964 KB ok
59 Correct 16 ms 16860 KB ok
60 Correct 20 ms 17244 KB ok
61 Correct 18 ms 17496 KB ok
62 Correct 24 ms 20828 KB ok
63 Correct 28 ms 20736 KB ok
64 Correct 23 ms 20828 KB ok
65 Correct 428 ms 158220 KB ok
66 Correct 295 ms 136624 KB ok
67 Correct 244 ms 128956 KB ok
68 Correct 315 ms 166480 KB ok
69 Correct 345 ms 161268 KB ok
70 Correct 387 ms 160940 KB ok
71 Correct 360 ms 165712 KB ok
72 Correct 347 ms 157268 KB ok
73 Correct 282 ms 137556 KB ok
74 Correct 272 ms 137808 KB ok
75 Correct 287 ms 137296 KB ok
76 Correct 300 ms 146084 KB ok
77 Correct 286 ms 146092 KB ok
78 Correct 361 ms 164260 KB ok
79 Correct 233 ms 128188 KB ok
80 Correct 229 ms 127968 KB ok
81 Correct 252 ms 130396 KB ok
82 Correct 278 ms 135164 KB ok
83 Correct 291 ms 133476 KB ok
84 Correct 245 ms 117580 KB ok
85 Correct 214 ms 114512 KB ok
86 Correct 230 ms 120164 KB ok
87 Correct 247 ms 120920 KB ok
88 Correct 254 ms 130132 KB ok
89 Correct 324 ms 144728 KB ok
90 Correct 280 ms 137296 KB ok
91 Correct 291 ms 146768 KB ok
92 Correct 259 ms 130356 KB ok
93 Correct 248 ms 130496 KB ok
94 Correct 231 ms 128832 KB ok
95 Correct 233 ms 128852 KB ok
96 Correct 235 ms 127948 KB ok
97 Correct 212 ms 127052 KB ok
98 Correct 211 ms 119632 KB ok
99 Correct 353 ms 158676 KB ok
100 Correct 346 ms 165968 KB ok
101 Correct 352 ms 165972 KB ok
102 Correct 352 ms 165972 KB ok
103 Correct 348 ms 166484 KB ok
104 Correct 374 ms 167504 KB ok
105 Correct 342 ms 166992 KB ok
106 Correct 409 ms 166480 KB ok
107 Correct 348 ms 167504 KB ok
108 Correct 263 ms 157068 KB ok
109 Correct 284 ms 158088 KB ok