oj.uz

Submission #1087338

# Submission time Handle Problem Language Result Execution time Memory
1087338 2024-09-12T13:45:57 Z urd05 Soccer Stadium (IOI23_soccer) C++17
100 / 100
 2826 ms 465488 KB 
#include "soccer.h"
#include <bits/stdc++.h>
using namespace std;

int n;
int arr[2001][2001];
typedef pair<int,int> P;
typedef pair<P,P> PP;
map<int,int> mp[2001][2001];
int psum[2001][2001];
int ri[2001][2001];
int ntr[2001][2001];
const long long three=1e12;
const long long two=1e8;
const long long one=1e4;

int query(int u,int d,int l,int r) {
    return psum[d][r]-psum[u-1][r]-psum[d][l-1]+psum[u-1][l-1];
}

long long hhash(PP x) {
    return x.first.first*three+x.first.second*two+x.second.first*one+x.second.second;
}

PP unhash(long long x) {
    PP ret;
    ret.second.second=x%(n+1);
    x/=n+1;
    ret.second.first=x%(n+1);
    x/=n+1;
    ret.first.second=x%(n+1);
    x/=n+1;
    ret.first.first=x%(n+1);
    return ret;
}

int ans(int l,int r,int u,int d) {
    if (mp[l][r].find(u)!=mp[l][r].end()) {
        return mp[l][r][u];
    }
    int now=l;
    if (arr[u-1][now]==1) {
        now=ntr[u-1][now];
    }
    int ret=(d-u+1)*(r-l+1);
    if (u>1) {
        while (now<=r) {
            int ll=now;
            int rr=min(ri[u-1][now],r);
            int uu=u;
            int dd=d;
                int lo=0;
                int hi=u;
                int val=psum[u-1][rr]-psum[u-1][ll-1];
                while (lo+1<hi) {
                    int mid=(lo+hi)/2;
                    if (-psum[mid-1][rr]+psum[mid-1][ll-1]==-val) {
                        hi=mid;
                    }
                    else {
                        lo=mid;
                    }
                }
                uu=hi;
                ret=max(ret,ans(ll,rr,uu,dd)+(r-l-rr+ll)*(d-u+1));
            now=ntr[u-1][ri[u-1][now]];
        }
    }
    now=l;
    if (arr[d+1][now]==1) {
        now=ntr[d+1][now];
    }
    if (d<n) {
        while (now<=r) {
            int ll=now;
            int rr=min(ri[d+1][now],r);
            int uu=u;
            int dd=d;
                int lo=d;
                int hi=n+1;
                int val=-psum[d][rr]+psum[d][ll-1];
                while (lo+1<hi) {
                    int mid=(lo+hi)/2;
                    if (psum[mid][rr]-psum[mid][ll-1]==-val) {
                        lo=mid;
                    }
                    else {
                        hi=mid;
                    }
                }
                dd=lo;
                ret=max(ret,ans(ll,rr,uu,dd)+(r-l-rr+ll)*(d-u+1));
            now=ntr[d+1][ri[d+1][now]];
        }
    }
    return mp[l][r][u]=ret;
}

int biggest_stadium(int N, std::vector<std::vector<int>> F)
{
    n=N;
    for(int i=0;i<n;i++) {
        for(int j=0;j<n;j++) {
            arr[i+1][j+1]=F[i][j];
        }
    }
    for(int i=1;i<=n;i++) {
        for(int j=1;j<=n;j++) {
            psum[i][j]=psum[i-1][j]+psum[i][j-1]-psum[i-1][j-1]+arr[i][j];
        }
    }
    for(int i=1;i<=n;i++) {
        int pr=0;
        for(int j=1;j<=n;j++) {
            if (arr[i][j]==1) {
                for(int k=pr+1;k<j;k++) {
                    ri[i][k]=j-1;
                }
                pr=j;
            }
        }
        for(int j=pr+1;j<=n;j++) {
            ri[i][j]=n;
        }
        pr=1;
        for(int j=1;j<=n;j++) {
            if (arr[i][j]==0) {
                for(int k=pr;k<j;k++) {
                    ntr[i][k]=j;
                }
                pr=j;
            }
        }
        for(int k=pr;k<=n;k++) {
            ntr[i][k]=n+1;
        }
    }
    int ret=0;
    for(int i=1;i<=n;i++) {
        int pr=0;
        for(int j=1;j<=n;j++) {
            if (arr[i][j]==1) {
                if (pr+1<=j-1) {
                    ret=max(ret,ans(pr+1,j-1,i,i));
                }
                pr=j;
            }
        }
        if (pr!=n) {
            ret=max(ret,ans(pr+1,n,i,i));
        }
    }
    return ret;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 188488 KB ok

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 188500 KB ok
2 Correct 70 ms 188496 KB ok
3 Correct 78 ms 188488 KB ok
4 Correct 69 ms 188508 KB ok
5 Correct 69 ms 188272 KB ok
6 Correct 73 ms 188496 KB ok
7 Correct 76 ms 190288 KB ok
8 Correct 93 ms 202912 KB ok
9 Correct 314 ms 290504 KB ok

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 188500 KB ok
2 Correct 70 ms 188496 KB ok
3 Correct 71 ms 188492 KB ok
4 Correct 71 ms 188400 KB ok
5 Correct 71 ms 188496 KB ok
6 Correct 71 ms 188308 KB ok
7 Correct 71 ms 188312 KB ok
8 Correct 71 ms 188672 KB ok
9 Correct 80 ms 188500 KB ok
10 Correct 73 ms 188488 KB ok
11 Correct 73 ms 188496 KB ok
12 Correct 72 ms 188384 KB ok
13 Correct 72 ms 188500 KB ok

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 188488 KB ok
2 Correct 72 ms 188500 KB ok
3 Correct 70 ms 188496 KB ok
4 Correct 71 ms 188492 KB ok
5 Correct 71 ms 188400 KB ok
6 Correct 71 ms 188496 KB ok
7 Correct 71 ms 188308 KB ok
8 Correct 71 ms 188312 KB ok
9 Correct 71 ms 188672 KB ok
10 Correct 80 ms 188500 KB ok
11 Correct 73 ms 188488 KB ok
12 Correct 73 ms 188496 KB ok
13 Correct 72 ms 188384 KB ok
14 Correct 72 ms 188500 KB ok
15 Correct 69 ms 188496 KB ok
16 Correct 73 ms 188392 KB ok
17 Correct 70 ms 188412 KB ok
18 Correct 71 ms 188488 KB ok
19 Correct 76 ms 188496 KB ok
20 Correct 80 ms 188440 KB ok
21 Correct 71 ms 188496 KB ok
22 Correct 72 ms 188380 KB ok
23 Correct 71 ms 188480 KB ok
24 Correct 77 ms 188500 KB ok
25 Correct 74 ms 188496 KB ok
26 Correct 70 ms 188496 KB ok

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 188488 KB ok
2 Correct 72 ms 188500 KB ok
3 Correct 70 ms 188496 KB ok
4 Correct 78 ms 188488 KB ok
5 Correct 69 ms 188508 KB ok
6 Correct 71 ms 188492 KB ok
7 Correct 71 ms 188400 KB ok
8 Correct 71 ms 188496 KB ok
9 Correct 71 ms 188308 KB ok
10 Correct 71 ms 188312 KB ok
11 Correct 71 ms 188672 KB ok
12 Correct 80 ms 188500 KB ok
13 Correct 73 ms 188488 KB ok
14 Correct 73 ms 188496 KB ok
15 Correct 72 ms 188384 KB ok
16 Correct 72 ms 188500 KB ok
17 Correct 69 ms 188496 KB ok
18 Correct 73 ms 188392 KB ok
19 Correct 70 ms 188412 KB ok
20 Correct 71 ms 188488 KB ok
21 Correct 76 ms 188496 KB ok
22 Correct 80 ms 188440 KB ok
23 Correct 71 ms 188496 KB ok
24 Correct 72 ms 188380 KB ok
25 Correct 71 ms 188480 KB ok
26 Correct 77 ms 188500 KB ok
27 Correct 74 ms 188496 KB ok
28 Correct 70 ms 188496 KB ok
29 Correct 70 ms 188476 KB ok
30 Correct 76 ms 189012 KB ok
31 Correct 73 ms 188928 KB ok
32 Correct 72 ms 189008 KB ok
33 Correct 70 ms 188752 KB ok
34 Correct 71 ms 188752 KB ok
35 Correct 71 ms 188752 KB ok
36 Correct 70 ms 188756 KB ok
37 Correct 71 ms 188756 KB ok
38 Correct 75 ms 188752 KB ok
39 Correct 72 ms 188752 KB ok
40 Correct 72 ms 188756 KB ok
41 Correct 71 ms 189012 KB ok

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 188488 KB ok
2 Correct 72 ms 188500 KB ok
3 Correct 70 ms 188496 KB ok
4 Correct 78 ms 188488 KB ok
5 Correct 69 ms 188508 KB ok
6 Correct 71 ms 188492 KB ok
7 Correct 71 ms 188400 KB ok
8 Correct 71 ms 188496 KB ok
9 Correct 71 ms 188308 KB ok
10 Correct 71 ms 188312 KB ok
11 Correct 71 ms 188672 KB ok
12 Correct 80 ms 188500 KB ok
13 Correct 73 ms 188488 KB ok
14 Correct 73 ms 188496 KB ok
15 Correct 72 ms 188384 KB ok
16 Correct 72 ms 188500 KB ok
17 Correct 69 ms 188496 KB ok
18 Correct 73 ms 188392 KB ok
19 Correct 70 ms 188412 KB ok
20 Correct 71 ms 188488 KB ok
21 Correct 76 ms 188496 KB ok
22 Correct 80 ms 188440 KB ok
23 Correct 71 ms 188496 KB ok
24 Correct 72 ms 188380 KB ok
25 Correct 71 ms 188480 KB ok
26 Correct 77 ms 188500 KB ok
27 Correct 74 ms 188496 KB ok
28 Correct 70 ms 188496 KB ok
29 Correct 70 ms 188476 KB ok
30 Correct 76 ms 189012 KB ok
31 Correct 73 ms 188928 KB ok
32 Correct 72 ms 189008 KB ok
33 Correct 70 ms 188752 KB ok
34 Correct 71 ms 188752 KB ok
35 Correct 71 ms 188752 KB ok
36 Correct 70 ms 188756 KB ok
37 Correct 71 ms 188756 KB ok
38 Correct 75 ms 188752 KB ok
39 Correct 72 ms 188752 KB ok
40 Correct 72 ms 188756 KB ok
41 Correct 71 ms 189012 KB ok
42 Correct 158 ms 211796 KB ok
43 Correct 153 ms 210256 KB ok
44 Correct 177 ms 212820 KB ok
45 Correct 161 ms 211920 KB ok
46 Correct 178 ms 212820 KB ok
47 Correct 91 ms 203092 KB ok
48 Correct 108 ms 204368 KB ok
49 Correct 105 ms 204188 KB ok
50 Correct 113 ms 208724 KB ok
51 Correct 113 ms 207852 KB ok
52 Correct 101 ms 201676 KB ok
53 Correct 95 ms 200532 KB ok
54 Correct 94 ms 201976 KB ok
55 Correct 106 ms 203348 KB ok
56 Correct 91 ms 202064 KB ok
57 Correct 108 ms 208588 KB ok
58 Correct 111 ms 209016 KB ok
59 Correct 112 ms 209708 KB ok

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 188488 KB ok
2 Correct 72 ms 188500 KB ok
3 Correct 70 ms 188496 KB ok
4 Correct 78 ms 188488 KB ok
5 Correct 69 ms 188508 KB ok
6 Correct 69 ms 188272 KB ok
7 Correct 73 ms 188496 KB ok
8 Correct 76 ms 190288 KB ok
9 Correct 93 ms 202912 KB ok
10 Correct 314 ms 290504 KB ok
11 Correct 71 ms 188492 KB ok
12 Correct 71 ms 188400 KB ok
13 Correct 71 ms 188496 KB ok
14 Correct 71 ms 188308 KB ok
15 Correct 71 ms 188312 KB ok
16 Correct 71 ms 188672 KB ok
17 Correct 80 ms 188500 KB ok
18 Correct 73 ms 188488 KB ok
19 Correct 73 ms 188496 KB ok
20 Correct 72 ms 188384 KB ok
21 Correct 72 ms 188500 KB ok
22 Correct 69 ms 188496 KB ok
23 Correct 73 ms 188392 KB ok
24 Correct 70 ms 188412 KB ok
25 Correct 71 ms 188488 KB ok
26 Correct 76 ms 188496 KB ok
27 Correct 80 ms 188440 KB ok
28 Correct 71 ms 188496 KB ok
29 Correct 72 ms 188380 KB ok
30 Correct 71 ms 188480 KB ok
31 Correct 77 ms 188500 KB ok
32 Correct 74 ms 188496 KB ok
33 Correct 70 ms 188496 KB ok
34 Correct 70 ms 188476 KB ok
35 Correct 76 ms 189012 KB ok
36 Correct 73 ms 188928 KB ok
37 Correct 72 ms 189008 KB ok
38 Correct 70 ms 188752 KB ok
39 Correct 71 ms 188752 KB ok
40 Correct 71 ms 188752 KB ok
41 Correct 70 ms 188756 KB ok
42 Correct 71 ms 188756 KB ok
43 Correct 75 ms 188752 KB ok
44 Correct 72 ms 188752 KB ok
45 Correct 72 ms 188756 KB ok
46 Correct 71 ms 189012 KB ok
47 Correct 158 ms 211796 KB ok
48 Correct 153 ms 210256 KB ok
49 Correct 177 ms 212820 KB ok
50 Correct 161 ms 211920 KB ok
51 Correct 178 ms 212820 KB ok
52 Correct 91 ms 203092 KB ok
53 Correct 108 ms 204368 KB ok
54 Correct 105 ms 204188 KB ok
55 Correct 113 ms 208724 KB ok
56 Correct 113 ms 207852 KB ok
57 Correct 101 ms 201676 KB ok
58 Correct 95 ms 200532 KB ok
59 Correct 94 ms 201976 KB ok
60 Correct 106 ms 203348 KB ok
61 Correct 91 ms 202064 KB ok
62 Correct 108 ms 208588 KB ok
63 Correct 111 ms 209016 KB ok
64 Correct 112 ms 209708 KB ok
65 Correct 2543 ms 435796 KB ok
66 Correct 832 ms 336980 KB ok
67 Correct 461 ms 307512 KB ok
68 Correct 2108 ms 429652 KB ok
69 Correct 2826 ms 465488 KB ok
70 Correct 2777 ms 461376 KB ok
71 Correct 1626 ms 396368 KB ok
72 Correct 326 ms 294440 KB ok
73 Correct 809 ms 321148 KB ok
74 Correct 837 ms 323072 KB ok
75 Correct 806 ms 321604 KB ok
76 Correct 902 ms 384168 KB ok
77 Correct 969 ms 384336 KB ok
78 Correct 969 ms 373212 KB ok
79 Correct 353 ms 297040 KB ok
80 Correct 352 ms 296784 KB ok
81 Correct 407 ms 302500 KB ok
82 Correct 516 ms 319524 KB ok
83 Correct 591 ms 318032 KB ok
84 Correct 335 ms 282964 KB ok
85 Correct 296 ms 277356 KB ok
86 Correct 343 ms 285356 KB ok
87 Correct 445 ms 295008 KB ok
88 Correct 451 ms 297212 KB ok
89 Correct 304 ms 291412 KB ok
90 Correct 312 ms 292176 KB ok
91 Correct 327 ms 292948 KB ok
92 Correct 418 ms 301744 KB ok
93 Correct 428 ms 304976 KB ok
94 Correct 347 ms 294336 KB ok
95 Correct 327 ms 292260 KB ok
96 Correct 327 ms 291668 KB ok
97 Correct 315 ms 291412 KB ok
98 Correct 306 ms 290144 KB ok
99 Correct 860 ms 374352 KB ok
100 Correct 851 ms 384592 KB ok
101 Correct 678 ms 379760 KB ok
102 Correct 739 ms 384344 KB ok
103 Correct 956 ms 393016 KB ok
104 Correct 853 ms 396568 KB ok
105 Correct 916 ms 399440 KB ok
106 Correct 1083 ms 404288 KB ok
107 Correct 1049 ms 407132 KB ok
108 Correct 763 ms 344144 KB ok
109 Correct 1014 ms 361116 KB ok