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Submission #227440

# Submission time Handle Problem Language Result Execution time Memory
227440 2020-04-27T12:33:02 Z MKopchev Bitaro’s Party (JOI18_bitaro) C++14
100 / 100
 1708 ms 120184 KB 
#include<bits/stdc++.h>
using namespace std;

const int nmax=1e5+42,CUT=100;

vector<int> adj[nmax],bck[nmax];

int n,m,q;

int sz,where;

int blocked[nmax];

bool is_blocked[nmax];

int dp[nmax];

int slow()
{
    for(int i=1;i<=n;i++)
        dp[i]=-1e9;

    dp[where]=0;

    for(int i=where-1;i>=1;i--)
    {
        for(auto k:adj[i])
            dp[i]=max(dp[i],dp[k]+1);
    }

    int mx=-1;
    for(int i=where;i>=1;i--)
        if(is_blocked[i]==0)mx=max(mx,dp[i]);

    return mx;
}

vector< pair<int/*distance*/,int/*start*/> > best[nmax];

int main()
{
    scanf("%i%i%i",&n,&m,&q);

    for(int i=1;i<=m;i++)
    {
        int u,v;
        scanf("%i%i",&u,&v);
        adj[u].push_back(v);
        bck[v].push_back(u);
    }

    vector< pair<int/*distance*/,int/*start*/> > help={};

    for(int i=1;i<=n;i++)
    {
        help={};

        for(auto node_back:bck[i])
            for(auto k:best[node_back])
            help.push_back({k.first+1,k.second});

        help.push_back({0,i});

        sort(help.begin(),help.end());

        reverse(help.begin(),help.end());

        for(auto k:help)
        {
            if(is_blocked[k.second]==0)
            {
                is_blocked[k.second]=1;
                best[i].push_back(k);

                if(best[i].size()==CUT)break;
            }
        }

        for(auto k:best[i])
            is_blocked[k.second]=0;
    }
    for(int i=1;i<=q;i++)
    {
        scanf("%i%i",&where,&sz);
        for(int j=1;j<=sz;j++)
        {
            scanf("%i",&blocked[j]);
            is_blocked[blocked[j]]=1;
        }

        if(sz>=CUT)printf("%i\n",slow());
        else
        {
            int mx=-1;
            for(auto k:best[where])
                if(is_blocked[k.second]==0)mx=max(mx,k.first);
            printf("%i\n",mx);
        }
        for(int j=1;j<=sz;j++)
        {
            is_blocked[blocked[j]]=0;
        }
    }
    return 0;
}

Compilation message

bitaro.cpp: In function 'int main()':
bitaro.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i%i%i",&n,&m,&q);
     ~~~~~^~~~~~~~~~~~~~~~~~~
bitaro.cpp:47:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i%i",&u,&v);
         ~~~~~^~~~~~~~~~~~~~
bitaro.cpp:84:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i%i",&where,&sz);
         ~~~~~^~~~~~~~~~~~~~~~~~~
bitaro.cpp:87:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%i",&blocked[j]);
             ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7424 KB Output is correct
2 Correct 9 ms 7424 KB Output is correct
3 Correct 8 ms 7424 KB Output is correct
4 Correct 10 ms 7424 KB Output is correct
5 Correct 13 ms 7808 KB Output is correct
6 Correct 13 ms 7808 KB Output is correct
7 Correct 12 ms 7808 KB Output is correct
8 Correct 16 ms 8448 KB Output is correct
9 Correct 17 ms 8448 KB Output is correct
10 Correct 17 ms 8448 KB Output is correct
11 Correct 18 ms 8448 KB Output is correct
12 Correct 16 ms 8192 KB Output is correct
13 Correct 17 ms 8320 KB Output is correct
14 Correct 15 ms 8064 KB Output is correct
15 Correct 13 ms 7936 KB Output is correct
16 Correct 16 ms 8064 KB Output is correct
17 Correct 17 ms 8192 KB Output is correct
18 Correct 15 ms 8064 KB Output is correct
19 Correct 18 ms 8192 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7424 KB Output is correct
2 Correct 9 ms 7424 KB Output is correct
3 Correct 8 ms 7424 KB Output is correct
4 Correct 10 ms 7424 KB Output is correct
5 Correct 13 ms 7808 KB Output is correct
6 Correct 13 ms 7808 KB Output is correct
7 Correct 12 ms 7808 KB Output is correct
8 Correct 16 ms 8448 KB Output is correct
9 Correct 17 ms 8448 KB Output is correct
10 Correct 17 ms 8448 KB Output is correct
11 Correct 18 ms 8448 KB Output is correct
12 Correct 16 ms 8192 KB Output is correct
13 Correct 17 ms 8320 KB Output is correct
14 Correct 15 ms 8064 KB Output is correct
15 Correct 13 ms 7936 KB Output is correct
16 Correct 16 ms 8064 KB Output is correct
17 Correct 17 ms 8192 KB Output is correct
18 Correct 15 ms 8064 KB Output is correct
19 Correct 18 ms 8192 KB Output is correct
20 Correct 1572 ms 10988 KB Output is correct
21 Correct 1553 ms 10856 KB Output is correct
22 Correct 1551 ms 10924 KB Output is correct
23 Correct 1529 ms 11648 KB Output is correct
24 Correct 1020 ms 90872 KB Output is correct
25 Correct 1061 ms 92328 KB Output is correct
26 Correct 1062 ms 92152 KB Output is correct
27 Correct 862 ms 116404 KB Output is correct
28 Correct 844 ms 116472 KB Output is correct
29 Correct 846 ms 116344 KB Output is correct
30 Correct 1016 ms 115836 KB Output is correct
31 Correct 1068 ms 114024 KB Output is correct
32 Correct 1010 ms 116232 KB Output is correct
33 Correct 811 ms 78692 KB Output is correct
34 Correct 817 ms 72024 KB Output is correct
35 Correct 805 ms 78192 KB Output is correct
36 Correct 959 ms 97436 KB Output is correct
37 Correct 950 ms 93332 KB Output is correct
38 Correct 958 ms 97756 KB Output is correct

Subtask #3
86.0 / 86.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7424 KB Output is correct
2 Correct 9 ms 7424 KB Output is correct
3 Correct 8 ms 7424 KB Output is correct
4 Correct 10 ms 7424 KB Output is correct
5 Correct 13 ms 7808 KB Output is correct
6 Correct 13 ms 7808 KB Output is correct
7 Correct 12 ms 7808 KB Output is correct
8 Correct 16 ms 8448 KB Output is correct
9 Correct 17 ms 8448 KB Output is correct
10 Correct 17 ms 8448 KB Output is correct
11 Correct 18 ms 8448 KB Output is correct
12 Correct 16 ms 8192 KB Output is correct
13 Correct 17 ms 8320 KB Output is correct
14 Correct 15 ms 8064 KB Output is correct
15 Correct 13 ms 7936 KB Output is correct
16 Correct 16 ms 8064 KB Output is correct
17 Correct 17 ms 8192 KB Output is correct
18 Correct 15 ms 8064 KB Output is correct
19 Correct 18 ms 8192 KB Output is correct
20 Correct 1572 ms 10988 KB Output is correct
21 Correct 1553 ms 10856 KB Output is correct
22 Correct 1551 ms 10924 KB Output is correct
23 Correct 1529 ms 11648 KB Output is correct
24 Correct 1020 ms 90872 KB Output is correct
25 Correct 1061 ms 92328 KB Output is correct
26 Correct 1062 ms 92152 KB Output is correct
27 Correct 862 ms 116404 KB Output is correct
28 Correct 844 ms 116472 KB Output is correct
29 Correct 846 ms 116344 KB Output is correct
30 Correct 1016 ms 115836 KB Output is correct
31 Correct 1068 ms 114024 KB Output is correct
32 Correct 1010 ms 116232 KB Output is correct
33 Correct 811 ms 78692 KB Output is correct
34 Correct 817 ms 72024 KB Output is correct
35 Correct 805 ms 78192 KB Output is correct
36 Correct 959 ms 97436 KB Output is correct
37 Correct 950 ms 93332 KB Output is correct
38 Correct 958 ms 97756 KB Output is correct
39 Correct 1106 ms 91640 KB Output is correct
40 Correct 1146 ms 94328 KB Output is correct
41 Correct 1702 ms 94584 KB Output is correct
42 Correct 1220 ms 94524 KB Output is correct
43 Correct 1080 ms 94072 KB Output is correct
44 Correct 1642 ms 14028 KB Output is correct
45 Correct 1605 ms 13172 KB Output is correct
46 Correct 1685 ms 12944 KB Output is correct
47 Correct 1613 ms 12736 KB Output is correct
48 Correct 1597 ms 12564 KB Output is correct
49 Correct 964 ms 119660 KB Output is correct
50 Correct 1449 ms 118836 KB Output is correct
51 Correct 1608 ms 13556 KB Output is correct
52 Correct 1663 ms 12892 KB Output is correct
53 Correct 978 ms 99832 KB Output is correct
54 Correct 993 ms 95852 KB Output is correct
55 Correct 1400 ms 99196 KB Output is correct
56 Correct 1435 ms 95732 KB Output is correct
57 Correct 1628 ms 13768 KB Output is correct
58 Correct 1633 ms 14068 KB Output is correct
59 Correct 1684 ms 12976 KB Output is correct
60 Correct 1692 ms 13256 KB Output is correct
61 Correct 958 ms 119032 KB Output is correct
62 Correct 1006 ms 99832 KB Output is correct
63 Correct 1012 ms 95028 KB Output is correct
64 Correct 1160 ms 118944 KB Output is correct
65 Correct 1382 ms 99448 KB Output is correct
66 Correct 1381 ms 95748 KB Output is correct
67 Correct 1323 ms 119000 KB Output is correct
68 Correct 1562 ms 99832 KB Output is correct
69 Correct 1391 ms 94576 KB Output is correct
70 Correct 903 ms 118960 KB Output is correct
71 Correct 918 ms 99696 KB Output is correct
72 Correct 945 ms 95396 KB Output is correct
73 Correct 993 ms 118904 KB Output is correct
74 Correct 1000 ms 99704 KB Output is correct
75 Correct 939 ms 95368 KB Output is correct
76 Correct 928 ms 120184 KB Output is correct
77 Correct 1326 ms 119356 KB Output is correct
78 Correct 862 ms 119416 KB Output is correct
79 Correct 1611 ms 13812 KB Output is correct
80 Correct 1654 ms 13044 KB Output is correct
81 Correct 1559 ms 12640 KB Output is correct
82 Correct 1035 ms 119444 KB Output is correct
83 Correct 1105 ms 117440 KB Output is correct
84 Correct 1432 ms 118620 KB Output is correct
85 Correct 1497 ms 116728 KB Output is correct
86 Correct 948 ms 118648 KB Output is correct
87 Correct 1042 ms 116728 KB Output is correct
88 Correct 1642 ms 13784 KB Output is correct
89 Correct 1643 ms 14148 KB Output is correct
90 Correct 1677 ms 12964 KB Output is correct
91 Correct 1697 ms 12912 KB Output is correct
92 Correct 1570 ms 12532 KB Output is correct
93 Correct 1569 ms 12560 KB Output is correct
94 Correct 852 ms 81912 KB Output is correct
95 Correct 814 ms 74724 KB Output is correct
96 Correct 1211 ms 80632 KB Output is correct
97 Correct 1196 ms 75164 KB Output is correct
98 Correct 811 ms 81060 KB Output is correct
99 Correct 761 ms 74692 KB Output is correct
100 Correct 1630 ms 14168 KB Output is correct
101 Correct 1596 ms 13980 KB Output is correct
102 Correct 1676 ms 13184 KB Output is correct
103 Correct 1638 ms 13468 KB Output is correct
104 Correct 1562 ms 12716 KB Output is correct
105 Correct 1600 ms 13292 KB Output is correct
106 Correct 1054 ms 100344 KB Output is correct
107 Correct 1012 ms 96308 KB Output is correct
108 Correct 1392 ms 100088 KB Output is correct
109 Correct 1446 ms 95492 KB Output is correct
110 Correct 929 ms 100088 KB Output is correct
111 Correct 951 ms 96092 KB Output is correct
112 Correct 1636 ms 13940 KB Output is correct
113 Correct 1633 ms 14276 KB Output is correct
114 Correct 1662 ms 13056 KB Output is correct
115 Correct 1708 ms 13156 KB Output is correct
116 Correct 1587 ms 12532 KB Output is correct
117 Correct 1575 ms 12928 KB Output is correct
118 Correct 941 ms 118776 KB Output is correct
119 Correct 951 ms 99448 KB Output is correct
120 Correct 977 ms 94736 KB Output is correct
121 Correct 882 ms 118576 KB Output is correct
122 Correct 990 ms 99200 KB Output is correct
123 Correct 969 ms 94580 KB Output is correct
124 Correct 851 ms 118392 KB Output is correct
125 Correct 953 ms 99536 KB Output is correct
126 Correct 962 ms 94780 KB Output is correct