oj.uz

Submission #939327

# Submission time Handle Problem Language Result Execution time Memory
939327 2024-03-06T09:19:49 Z Wansur Soccer Stadium (IOI23_soccer) C++17
61 / 100
 463 ms 310184 KB 
#include <bits/stdc++.h>
#define f first
#define s second
#define ent '\n'
 
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")
 
typedef long long ll;
using namespace std;
struct seg{
    int m1,m2,sum,cnt;
};
 
const string out[2]={"NO\n","YES\n"};
 
const ll dx[]={0,1,0,-1,-1,1,1,-1};
const ll dy[]={1,0,-1,0,-1,1,-1,1};
const int mod=998244353;
const int md=1e9+7;
const int mx=2e3+12;
const bool T=0;
 
int dp[61][61][61][61];
bool used[2001][2001];
int pref[61][61];
int n;
 
int get(int i,int l,int r){
    if(!l)return pref[i][r];
    return pref[i][r]-pref[i][l-1];
}
 
void dfs(int x,int y){
    used[x][y]=1;
    for(int i=0;i<4;i++){
        int x1=dx[i]+x,y1=dy[i]+y;
        if(min(x1,y1)>=0 && max(x1,y1)<n && !used[x1][y1]){
            dfs(x1,y1);
        }
    }
}
 
int solve(int N, vector<vector<int>> a){
 
    int sum=0;
    n=N;
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            sum+=!a[i][j];
            if(a[i][j]){
                used[i][j]=1;
            }
        }
    }
    bool ok=0;
    int pos=0;
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(!used[i][j]){
                pos=i;
                if(ok)return 0;
                ok=1;
                dfs(i,j);
            }
        }
    }
    int l=-1,r=-1;
    int len=0,sg=0;
    vector<pair<int,int>> v;
    for(int i=pos;i<n;i++){
        int tl=-1,tr=-1,sum=0;
        for(int j=0;j<n;j++){
            if(!a[i][j]) {
                ok = 1;
                if(tl==-1){
                    tl=j;
                }
                tr=j;
                sum++;
            }
        }
        if(tl==-1)break;
        if(l==-1){
            l=tl,r=tr;
        }
        if(!(l<=tl && tr<=r || tl<=l && r<=tr) || sum!=tr-tl+1){
            return 0;
        }
        if(r-l+1 <= tr-tl+1){
            if(r-l+1 < tr-tl+1 && sg){
                return 0;
            }
        }
        else{
            sg=1;
        }
        l=tl,r=tr;
        v.push_back({tl,tr});
    }
    sort(v.begin(),v.end(),[](pair<int,int> a,pair<int,int> b){
        return a.s-a.f>b.s-b.f;
    });
    l=v[0].f,r=v[0].s;
    for(auto [tl,tr]: v){
        if(tl < l || tr > r){
            return 0;
        }
        l=tl, r=tr;
    }
    return sum;
}
 
int biggest_stadium(int N, vector<vector<int>> a) {
    n = N;
    if (n > 30) {
        return solve(N, a);
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            pref[i][j] = a[i][j];
            if (j)pref[i][j] += pref[i][j - 1];
        }
    }
    int ans=0;
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            for(int l=0;l<n;l++){
                for(int r=0;r<n;r++){
                    dp[i][j][l][r]=-1e9;
                }
            }
        }
    }
    for(int i=0;i<n;i++){
        for(int l=0;l<n;l++){
            for(int r=l;r<n;r++){
                if(a[i][r])break;
                ans=max(ans,r-l+1);
                dp[i][i][l][r]=r-l+1;
            }
        }
    }
    for(int len=2;len<=n;len++){
        for(int i=0;i+len-1<n;i++){
            int j=i+len-1;
            for(int len=1;len<=n;len++){
                for(int l=0;l+len-1<n;l++){
                    int r=l+len-1;
                    if(!get(i,l,r)){
                        for(int tl=l;tl>=0;tl--){
                            for(int tr=r;tr<n;tr++){
                                dp[i][j][l][r]=max(dp[i][j][l][r], dp[i+1][j][tl][tr] + r-l+1);
                            }
                        }
                    }
                    if(!get(j,l,r)){
                        for(int tl=l;tl>=0;tl--){
                            for(int tr=r;tr<n;tr++){
                                dp[i][j][l][r]=max(dp[i][j][l][r], dp[i][j-1][tl][tr] + r-l+1);
                            }
                        }
                    }
                    ans=max(ans,dp[i][j][l][r]);
                }
            }
        }
    }
    return ans;
}

Compilation message

soccer.cpp: In function 'int solve(int, std::vector<std::vector<int> >)':
soccer.cpp:87:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   87 |         if(!(l<=tl && tr<=r || tl<=l && r<=tr) || sum!=tr-tl+1){
      |              ~~~~~~^~~~~~~~
soccer.cpp:69:9: warning: unused variable 'len' [-Wunused-variable]
   69 |     int len=0,sg=0;
      |         ^~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB ok

Subtask #1
1.5 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB ok
2 Correct 2 ms 4444 KB ok
3 Correct 1 ms 10588 KB ok
4 Correct 2 ms 10588 KB ok
5 Correct 1 ms 2396 KB ok
6 Correct 1 ms 4548 KB ok
7 Partially correct 2 ms 1368 KB partial
8 Partially correct 35 ms 21588 KB partial
9 Partially correct 463 ms 310184 KB partial

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB ok
2 Correct 2 ms 4444 KB ok
3 Correct 1 ms 4444 KB ok
4 Correct 1 ms 4544 KB ok
5 Correct 1 ms 4444 KB ok
6 Correct 1 ms 4444 KB ok
7 Correct 1 ms 4444 KB ok
8 Correct 1 ms 4444 KB ok
9 Correct 1 ms 4444 KB ok
10 Correct 1 ms 4544 KB ok
11 Correct 1 ms 4444 KB ok
12 Correct 1 ms 4444 KB ok
13 Correct 1 ms 4444 KB ok

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB ok
2 Correct 1 ms 4444 KB ok
3 Correct 2 ms 4444 KB ok
4 Correct 1 ms 4444 KB ok
5 Correct 1 ms 4544 KB ok
6 Correct 1 ms 4444 KB ok
7 Correct 1 ms 4444 KB ok
8 Correct 1 ms 4444 KB ok
9 Correct 1 ms 4444 KB ok
10 Correct 1 ms 4444 KB ok
11 Correct 1 ms 4544 KB ok
12 Correct 1 ms 4444 KB ok
13 Correct 1 ms 4444 KB ok
14 Correct 1 ms 4444 KB ok
15 Correct 3 ms 8540 KB ok
16 Correct 1 ms 8540 KB ok
17 Correct 1 ms 8540 KB ok
18 Correct 1 ms 8540 KB ok
19 Correct 1 ms 8540 KB ok
20 Correct 1 ms 8540 KB ok
21 Correct 1 ms 8540 KB ok
22 Correct 1 ms 8540 KB ok
23 Correct 1 ms 8540 KB ok
24 Correct 1 ms 8540 KB ok
25 Correct 1 ms 8540 KB ok
26 Correct 1 ms 8636 KB ok

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB ok
2 Correct 1 ms 4444 KB ok
3 Correct 2 ms 4444 KB ok
4 Correct 1 ms 10588 KB ok
5 Correct 2 ms 10588 KB ok
6 Correct 1 ms 4444 KB ok
7 Correct 1 ms 4544 KB ok
8 Correct 1 ms 4444 KB ok
9 Correct 1 ms 4444 KB ok
10 Correct 1 ms 4444 KB ok
11 Correct 1 ms 4444 KB ok
12 Correct 1 ms 4444 KB ok
13 Correct 1 ms 4544 KB ok
14 Correct 1 ms 4444 KB ok
15 Correct 1 ms 4444 KB ok
16 Correct 1 ms 4444 KB ok
17 Correct 3 ms 8540 KB ok
18 Correct 1 ms 8540 KB ok
19 Correct 1 ms 8540 KB ok
20 Correct 1 ms 8540 KB ok
21 Correct 1 ms 8540 KB ok
22 Correct 1 ms 8540 KB ok
23 Correct 1 ms 8540 KB ok
24 Correct 1 ms 8540 KB ok
25 Correct 1 ms 8540 KB ok
26 Correct 1 ms 8540 KB ok
27 Correct 1 ms 8540 KB ok
28 Correct 1 ms 8636 KB ok
29 Correct 1 ms 8540 KB ok
30 Correct 20 ms 29152 KB ok
31 Correct 16 ms 29164 KB ok
32 Correct 9 ms 29020 KB ok
33 Correct 5 ms 29020 KB ok
34 Correct 7 ms 29020 KB ok
35 Correct 12 ms 29016 KB ok
36 Correct 6 ms 29020 KB ok
37 Correct 7 ms 29020 KB ok
38 Correct 8 ms 29020 KB ok
39 Correct 8 ms 29120 KB ok
40 Correct 23 ms 29188 KB ok
41 Correct 25 ms 29016 KB ok

Subtask #5
4.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB ok
2 Correct 1 ms 4444 KB ok
3 Correct 2 ms 4444 KB ok
4 Correct 1 ms 10588 KB ok
5 Correct 2 ms 10588 KB ok
6 Correct 1 ms 4444 KB ok
7 Correct 1 ms 4544 KB ok
8 Correct 1 ms 4444 KB ok
9 Correct 1 ms 4444 KB ok
10 Correct 1 ms 4444 KB ok
11 Correct 1 ms 4444 KB ok
12 Correct 1 ms 4444 KB ok
13 Correct 1 ms 4544 KB ok
14 Correct 1 ms 4444 KB ok
15 Correct 1 ms 4444 KB ok
16 Correct 1 ms 4444 KB ok
17 Correct 3 ms 8540 KB ok
18 Correct 1 ms 8540 KB ok
19 Correct 1 ms 8540 KB ok
20 Correct 1 ms 8540 KB ok
21 Correct 1 ms 8540 KB ok
22 Correct 1 ms 8540 KB ok
23 Correct 1 ms 8540 KB ok
24 Correct 1 ms 8540 KB ok
25 Correct 1 ms 8540 KB ok
26 Correct 1 ms 8540 KB ok
27 Correct 1 ms 8540 KB ok
28 Correct 1 ms 8636 KB ok
29 Correct 1 ms 8540 KB ok
30 Correct 20 ms 29152 KB ok
31 Correct 16 ms 29164 KB ok
32 Correct 9 ms 29020 KB ok
33 Correct 5 ms 29020 KB ok
34 Correct 7 ms 29020 KB ok
35 Correct 12 ms 29016 KB ok
36 Correct 6 ms 29020 KB ok
37 Correct 7 ms 29020 KB ok
38 Correct 8 ms 29020 KB ok
39 Correct 8 ms 29120 KB ok
40 Correct 23 ms 29188 KB ok
41 Correct 25 ms 29016 KB ok
42 Partially correct 26 ms 16976 KB partial
43 Partially correct 24 ms 13916 KB partial
44 Partially correct 27 ms 20828 KB partial
45 Partially correct 27 ms 21140 KB partial
46 Partially correct 26 ms 19284 KB partial
47 Partially correct 27 ms 21584 KB partial
48 Correct 22 ms 13912 KB ok
49 Partially correct 24 ms 14344 KB partial
50 Partially correct 29 ms 13912 KB partial
51 Partially correct 15 ms 5980 KB partial
52 Partially correct 17 ms 8028 KB partial
53 Partially correct 16 ms 6940 KB partial
54 Partially correct 22 ms 8016 KB partial
55 Partially correct 18 ms 9308 KB partial
56 Partially correct 20 ms 12372 KB partial
57 Partially correct 24 ms 17756 KB partial
58 Partially correct 23 ms 17184 KB partial
59 Partially correct 23 ms 15960 KB partial

Subtask #6
7.5 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB ok
2 Correct 1 ms 4444 KB ok
3 Correct 2 ms 4444 KB ok
4 Correct 1 ms 10588 KB ok
5 Correct 2 ms 10588 KB ok
6 Correct 1 ms 2396 KB ok
7 Correct 1 ms 4548 KB ok
8 Partially correct 2 ms 1368 KB partial
9 Partially correct 35 ms 21588 KB partial
10 Partially correct 463 ms 310184 KB partial
11 Correct 1 ms 4444 KB ok
12 Correct 1 ms 4544 KB ok
13 Correct 1 ms 4444 KB ok
14 Correct 1 ms 4444 KB ok
15 Correct 1 ms 4444 KB ok
16 Correct 1 ms 4444 KB ok
17 Correct 1 ms 4444 KB ok
18 Correct 1 ms 4544 KB ok
19 Correct 1 ms 4444 KB ok
20 Correct 1 ms 4444 KB ok
21 Correct 1 ms 4444 KB ok
22 Correct 3 ms 8540 KB ok
23 Correct 1 ms 8540 KB ok
24 Correct 1 ms 8540 KB ok
25 Correct 1 ms 8540 KB ok
26 Correct 1 ms 8540 KB ok
27 Correct 1 ms 8540 KB ok
28 Correct 1 ms 8540 KB ok
29 Correct 1 ms 8540 KB ok
30 Correct 1 ms 8540 KB ok
31 Correct 1 ms 8540 KB ok
32 Correct 1 ms 8540 KB ok
33 Correct 1 ms 8636 KB ok
34 Correct 1 ms 8540 KB ok
35 Correct 20 ms 29152 KB ok
36 Correct 16 ms 29164 KB ok
37 Correct 9 ms 29020 KB ok
38 Correct 5 ms 29020 KB ok
39 Correct 7 ms 29020 KB ok
40 Correct 12 ms 29016 KB ok
41 Correct 6 ms 29020 KB ok
42 Correct 7 ms 29020 KB ok
43 Correct 8 ms 29020 KB ok
44 Correct 8 ms 29120 KB ok
45 Correct 23 ms 29188 KB ok
46 Correct 25 ms 29016 KB ok
47 Partially correct 26 ms 16976 KB partial
48 Partially correct 24 ms 13916 KB partial
49 Partially correct 27 ms 20828 KB partial
50 Partially correct 27 ms 21140 KB partial
51 Partially correct 26 ms 19284 KB partial
52 Partially correct 27 ms 21584 KB partial
53 Correct 22 ms 13912 KB ok
54 Partially correct 24 ms 14344 KB partial
55 Partially correct 29 ms 13912 KB partial
56 Partially correct 15 ms 5980 KB partial
57 Partially correct 17 ms 8028 KB partial
58 Partially correct 16 ms 6940 KB partial
59 Partially correct 22 ms 8016 KB partial
60 Partially correct 18 ms 9308 KB partial
61 Partially correct 20 ms 12372 KB partial
62 Partially correct 24 ms 17756 KB partial
63 Partially correct 23 ms 17184 KB partial
64 Partially correct 23 ms 15960 KB partial
65 Partially correct 417 ms 239520 KB partial
66 Partially correct 251 ms 59476 KB partial
67 Partially correct 235 ms 59660 KB partial
68 Partially correct 439 ms 308304 KB partial
69 Partially correct 424 ms 300372 KB partial
70 Partially correct 412 ms 289212 KB partial
71 Partially correct 440 ms 308624 KB partial
72 Partially correct 441 ms 310140 KB partial
73 Correct 343 ms 185068 KB ok
74 Correct 330 ms 187472 KB ok
75 Partially correct 346 ms 186960 KB partial
76 Partially correct 336 ms 184912 KB partial
77 Partially correct 359 ms 184988 KB partial
78 Partially correct 235 ms 59664 KB partial
79 Partially correct 239 ms 59600 KB partial
80 Partially correct 237 ms 59860 KB partial
81 Partially correct 234 ms 59472 KB partial
82 Partially correct 247 ms 59540 KB partial
83 Partially correct 248 ms 59668 KB partial
84 Partially correct 294 ms 82224 KB partial
85 Partially correct 247 ms 73748 KB partial
86 Partially correct 276 ms 93652 KB partial
87 Partially correct 259 ms 96796 KB partial
88 Partially correct 331 ms 160336 KB partial
89 Partially correct 440 ms 285776 KB partial
90 Partially correct 384 ms 228176 KB partial
91 Partially correct 429 ms 270268 KB partial
92 Partially correct 239 ms 59472 KB partial
93 Partially correct 263 ms 59476 KB partial
94 Partially correct 232 ms 59556 KB partial
95 Partially correct 232 ms 59476 KB partial
96 Partially correct 229 ms 59504 KB partial
97 Partially correct 236 ms 59664 KB partial
98 Partially correct 234 ms 59476 KB partial
99 Partially correct 230 ms 59664 KB partial
100 Partially correct 425 ms 247376 KB partial
101 Partially correct 266 ms 88120 KB partial
102 Partially correct 280 ms 90896 KB partial
103 Partially correct 384 ms 234068 KB partial
104 Partially correct 270 ms 100888 KB partial
105 Partially correct 353 ms 104520 KB partial
106 Partially correct 368 ms 203968 KB partial
107 Partially correct 347 ms 187112 KB partial
108 Partially correct 250 ms 59624 KB partial
109 Partially correct 266 ms 51796 KB partial