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Submission #862663

# Submission time Handle Problem Language Result Execution time Memory
862663 2023-10-18T18:32:49 Z mraron Bitaro’s Party (JOI18_bitaro) C++14
100 / 100
 1323 ms 467684 KB 
#include<bits/stdc++.h>
using namespace std;

const int MAXN=100001;

int n,m,q;
vector<int> adj[MAXN];
vector<int> badj[MAXN];

const int blksz=344;
vector<pair<int,int>> best[MAXN];
int vis[MAXN], indeg[MAXN], volt[MAXN];
int currMark=0;
void dfs(int x) {
    vis[x]=1;
    for(auto& i:best[x]) i.first++;
    best[x].push_back({0, x});
    if(best[x].size()>blksz) best[x].resize(blksz);
    
    for(int i:adj[x]) {
        indeg[i]--;
        
        vector<pair<int,int>> res;
        res.resize(best[x].size()+best[i].size());
        merge(best[i].begin(), best[i].end(), best[x].begin(), best[x].end(), res.begin(), [&](auto& x, auto& y) -> bool {
            return x>y;
        });
        best[i].clear();
        best[i].shrink_to_fit();
        
        currMark++;
        for(auto& j:res) {
            if(volt[j.second]!=currMark) {
                best[i].push_back(j);
                volt[j.second]=currMark;
            }
        }
        
        if(!indeg[i]) {
            dfs(i);
        }
    }
}

int blocked[MAXN];
int dp[MAXN];
int ans=0;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>m>>q;
    for(int i=0;i<m;++i) {
        int a,b;
        cin>>a>>b;
        adj[a].push_back(b);
        indeg[b]++;
        badj[b].push_back(a);
    }
    
    for(int i=1;i<=n;++i) if(!vis[i]) dfs(i);
    //~ for(int i=1;i<=n;++i) {
        //~ for(auto& [j,k]:best[i]) cerr<<j<<";"<<k<<" ";
        //~ cerr<<"\n";
    //~ }
    
    
    for(int i=0;i<q;++i) {
        int t,cnt;
        cin>>t>>cnt;
        vector<int> y(cnt);
        for(int& j:y) cin>>j;
        
        for(int j:y) blocked[j]=1;
        //~ cerr<<best[t].size()<<"!!\n";
        if((int)best[t].size()>cnt) {
            bool found=false;
            for(auto& j:best[t]) {
                if(!blocked[j.second]) {
                    cout<<j.first<<"\n";
                    found=true;
                    break ;
                }
            }
            if(!found) cout<<"-1\n";
        }else {
            for(int j=1;j<=n;++j) {
                dp[j]=-1;
            }
            
            ans=-1;
            dp[t]=0;
            for(int i=t;i>=1;i--) {
                if(!blocked[i]) ans=max(ans, dp[i]);
                if(dp[i]!=-1) {
                    for(int j:badj[i]) {
                        dp[j]=max(dp[j], dp[i]+1);
                    }
                }
            }
            cout<<ans<<"\n";
        }
        
        for(int j:y) blocked[j]=0;
    }
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9048 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Correct 2 ms 9052 KB Output is correct
4 Correct 2 ms 9052 KB Output is correct
5 Correct 4 ms 9820 KB Output is correct
6 Correct 4 ms 9888 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 8 ms 13404 KB Output is correct
9 Correct 10 ms 13408 KB Output is correct
10 Correct 9 ms 13372 KB Output is correct
11 Correct 8 ms 12888 KB Output is correct
12 Correct 5 ms 10844 KB Output is correct
13 Correct 8 ms 12636 KB Output is correct
14 Correct 7 ms 11608 KB Output is correct
15 Correct 6 ms 10328 KB Output is correct
16 Correct 6 ms 11608 KB Output is correct
17 Correct 7 ms 11864 KB Output is correct
18 Correct 5 ms 10588 KB Output is correct
19 Correct 8 ms 11756 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9048 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Correct 2 ms 9052 KB Output is correct
4 Correct 2 ms 9052 KB Output is correct
5 Correct 4 ms 9820 KB Output is correct
6 Correct 4 ms 9888 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 8 ms 13404 KB Output is correct
9 Correct 10 ms 13408 KB Output is correct
10 Correct 9 ms 13372 KB Output is correct
11 Correct 8 ms 12888 KB Output is correct
12 Correct 5 ms 10844 KB Output is correct
13 Correct 8 ms 12636 KB Output is correct
14 Correct 7 ms 11608 KB Output is correct
15 Correct 6 ms 10328 KB Output is correct
16 Correct 6 ms 11608 KB Output is correct
17 Correct 7 ms 11864 KB Output is correct
18 Correct 5 ms 10588 KB Output is correct
19 Correct 8 ms 11756 KB Output is correct
20 Correct 397 ms 16976 KB Output is correct
21 Correct 376 ms 16980 KB Output is correct
22 Correct 395 ms 17012 KB Output is correct
23 Correct 591 ms 17056 KB Output is correct
24 Correct 721 ms 301556 KB Output is correct
25 Correct 752 ms 310668 KB Output is correct
26 Correct 736 ms 309584 KB Output is correct
27 Correct 787 ms 458996 KB Output is correct
28 Correct 807 ms 459712 KB Output is correct
29 Correct 788 ms 458920 KB Output is correct
30 Correct 762 ms 454340 KB Output is correct
31 Correct 801 ms 463504 KB Output is correct
32 Correct 821 ms 455536 KB Output is correct
33 Correct 578 ms 275224 KB Output is correct
34 Correct 671 ms 312624 KB Output is correct
35 Correct 567 ms 273064 KB Output is correct
36 Correct 689 ms 364976 KB Output is correct
37 Correct 718 ms 357344 KB Output is correct
38 Correct 644 ms 365908 KB Output is correct

Subtask #3
86.0 / 86.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9048 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Correct 2 ms 9052 KB Output is correct
4 Correct 2 ms 9052 KB Output is correct
5 Correct 4 ms 9820 KB Output is correct
6 Correct 4 ms 9888 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 8 ms 13404 KB Output is correct
9 Correct 10 ms 13408 KB Output is correct
10 Correct 9 ms 13372 KB Output is correct
11 Correct 8 ms 12888 KB Output is correct
12 Correct 5 ms 10844 KB Output is correct
13 Correct 8 ms 12636 KB Output is correct
14 Correct 7 ms 11608 KB Output is correct
15 Correct 6 ms 10328 KB Output is correct
16 Correct 6 ms 11608 KB Output is correct
17 Correct 7 ms 11864 KB Output is correct
18 Correct 5 ms 10588 KB Output is correct
19 Correct 8 ms 11756 KB Output is correct
20 Correct 397 ms 16976 KB Output is correct
21 Correct 376 ms 16980 KB Output is correct
22 Correct 395 ms 17012 KB Output is correct
23 Correct 591 ms 17056 KB Output is correct
24 Correct 721 ms 301556 KB Output is correct
25 Correct 752 ms 310668 KB Output is correct
26 Correct 736 ms 309584 KB Output is correct
27 Correct 787 ms 458996 KB Output is correct
28 Correct 807 ms 459712 KB Output is correct
29 Correct 788 ms 458920 KB Output is correct
30 Correct 762 ms 454340 KB Output is correct
31 Correct 801 ms 463504 KB Output is correct
32 Correct 821 ms 455536 KB Output is correct
33 Correct 578 ms 275224 KB Output is correct
34 Correct 671 ms 312624 KB Output is correct
35 Correct 567 ms 273064 KB Output is correct
36 Correct 689 ms 364976 KB Output is correct
37 Correct 718 ms 357344 KB Output is correct
38 Correct 644 ms 365908 KB Output is correct
39 Correct 1320 ms 309076 KB Output is correct
40 Correct 873 ms 306568 KB Output is correct
41 Correct 753 ms 308308 KB Output is correct
42 Correct 775 ms 308004 KB Output is correct
43 Correct 724 ms 308164 KB Output is correct
44 Correct 422 ms 18260 KB Output is correct
45 Correct 412 ms 17492 KB Output is correct
46 Correct 407 ms 17396 KB Output is correct
47 Correct 410 ms 17200 KB Output is correct
48 Correct 420 ms 16844 KB Output is correct
49 Correct 897 ms 461140 KB Output is correct
50 Correct 864 ms 458832 KB Output is correct
51 Correct 390 ms 18004 KB Output is correct
52 Correct 381 ms 17136 KB Output is correct
53 Correct 1208 ms 364788 KB Output is correct
54 Correct 1323 ms 361556 KB Output is correct
55 Correct 671 ms 363872 KB Output is correct
56 Correct 734 ms 366532 KB Output is correct
57 Correct 435 ms 18192 KB Output is correct
58 Correct 427 ms 17924 KB Output is correct
59 Correct 417 ms 17180 KB Output is correct
60 Correct 406 ms 17156 KB Output is correct
61 Correct 906 ms 460828 KB Output is correct
62 Correct 693 ms 365652 KB Output is correct
63 Correct 741 ms 358740 KB Output is correct
64 Correct 892 ms 459456 KB Output is correct
65 Correct 699 ms 364116 KB Output is correct
66 Correct 769 ms 373588 KB Output is correct
67 Correct 833 ms 461396 KB Output is correct
68 Correct 691 ms 365140 KB Output is correct
69 Correct 703 ms 353616 KB Output is correct
70 Correct 871 ms 460352 KB Output is correct
71 Correct 662 ms 365392 KB Output is correct
72 Correct 722 ms 360620 KB Output is correct
73 Correct 891 ms 459816 KB Output is correct
74 Correct 693 ms 365680 KB Output is correct
75 Correct 714 ms 359892 KB Output is correct
76 Correct 884 ms 461240 KB Output is correct
77 Correct 871 ms 460020 KB Output is correct
78 Correct 843 ms 461040 KB Output is correct
79 Correct 400 ms 18240 KB Output is correct
80 Correct 378 ms 17404 KB Output is correct
81 Correct 380 ms 16976 KB Output is correct
82 Correct 834 ms 456788 KB Output is correct
83 Correct 872 ms 462636 KB Output is correct
84 Correct 771 ms 455364 KB Output is correct
85 Correct 825 ms 467684 KB Output is correct
86 Correct 773 ms 455856 KB Output is correct
87 Correct 818 ms 465896 KB Output is correct
88 Correct 436 ms 18228 KB Output is correct
89 Correct 418 ms 18248 KB Output is correct
90 Correct 408 ms 17508 KB Output is correct
91 Correct 407 ms 17384 KB Output is correct
92 Correct 404 ms 17040 KB Output is correct
93 Correct 396 ms 16980 KB Output is correct
94 Correct 1094 ms 276496 KB Output is correct
95 Correct 1261 ms 333864 KB Output is correct
96 Correct 544 ms 274000 KB Output is correct
97 Correct 691 ms 336196 KB Output is correct
98 Correct 571 ms 274516 KB Output is correct
99 Correct 638 ms 325712 KB Output is correct
100 Correct 557 ms 18528 KB Output is correct
101 Correct 580 ms 18404 KB Output is correct
102 Correct 545 ms 17544 KB Output is correct
103 Correct 559 ms 17384 KB Output is correct
104 Correct 543 ms 17240 KB Output is correct
105 Correct 545 ms 16980 KB Output is correct
106 Correct 1181 ms 365396 KB Output is correct
107 Correct 1243 ms 365916 KB Output is correct
108 Correct 674 ms 366420 KB Output is correct
109 Correct 711 ms 359876 KB Output is correct
110 Correct 662 ms 366528 KB Output is correct
111 Correct 752 ms 361432 KB Output is correct
112 Correct 415 ms 18212 KB Output is correct
113 Correct 428 ms 18244 KB Output is correct
114 Correct 404 ms 17232 KB Output is correct
115 Correct 398 ms 17232 KB Output is correct
116 Correct 422 ms 16980 KB Output is correct
117 Correct 398 ms 17028 KB Output is correct
118 Correct 875 ms 459592 KB Output is correct
119 Correct 764 ms 366540 KB Output is correct
120 Correct 769 ms 354476 KB Output is correct
121 Correct 854 ms 460964 KB Output is correct
122 Correct 778 ms 365028 KB Output is correct
123 Correct 878 ms 363088 KB Output is correct
124 Correct 856 ms 459744 KB Output is correct
125 Correct 700 ms 366552 KB Output is correct
126 Correct 750 ms 365068 KB Output is correct