oj.uz

Submission #926530

# Submission time Handle Problem Language Result Execution time Memory
926530 2024-02-13T08:20:12 Z andrei_boaca Event Hopping 2 (JOI21_event2) C++17
100 / 100
 209 ms 39368 KB 
#include <bits/stdc++.h>

using namespace std;
typedef pair<int,int> pii;
const int INF=1e9+5;
int n,k,where[100005],nxt[100005],dp[21][100005],loga[100005];
int rmq[21][100005];
struct date
{
    int l,r,ind;
} v[100005];
bool byr(date a, date b)
{
    return a.r<b.r;
}
map<pii,int> f;
set<pii> setik;
int getval(int st,int dr)
{
    int rez=0;
    for(int i=18;i>=0;i--)
        if(dp[i][st]<=n&&v[dp[i][st]].r<=v[dr].l)
        {
            rez+=(1<<i);
            st=dp[i][st];
        }
    return rez;
}
int getmax(int l,int r)
{
    int lg=loga[r-l+1];
    return max(rmq[lg][l],rmq[lg][r-(1<<lg)+1]);
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>k;
    for(int i=1;i<=n;i++)
    {
        cin>>v[i].l>>v[i].r;
        v[i].ind=i;
    }
    sort(v+1,v+n+1,byr);
    int r=0;
    int jaxi=0;
    for(int i=1;i<=n;i++)
    {
        if(v[i].l>=r)
        {
            r=v[i].r;
            jaxi++;
        }
    }
    if(jaxi<k)
    {
        cout<<-1;
        return 0;
    }
    v[0]={0,0,0};
    v[n+1]={INF,INF,n+1};
    for(int i=0;i<=n+1;i++)
        rmq[0][i]=v[i].l;
    for(int i=1;i<=n+1;i++)
    {
        for(int bit=0;bit<=20;bit++)
            if((1<<bit)<=i)
                loga[i]=bit;
    }
    for(int j=1;j<=18;j++)
        for(int i=0;i<=n+1;i++)
        {
            rmq[j][i]=rmq[j-1][i];
            int poz=i+(1<<(j-1));
            if(poz<=n+1)
                rmq[j][i]=max(rmq[j][i],rmq[j-1][poz]);
        }
    nxt[n+1]=n+1;
    for(int i=0;i<=n+1;i++)
    {
        where[v[i].ind]=i;
        /*for(int j=i+1;j<=n+1;j++)
            if(v[j].l>=v[i].r)
            {
                nxt[i]=j;
                break;
            }*/
        int st=i+1;
        int dr=n+1;
        nxt[i]=n+1;
        while(st<=dr)
        {
            int mij=(st+dr)/2;
            if(getmax(i+1,mij)>=v[i].r)
            {
                nxt[i]=mij;
                dr=mij-1;
            }
            else
                st=mij+1;
        }
    }
    for(int i=0;i<=n+1;i++)
        dp[0][i]=nxt[i];
    for(int j=1;j<=18;j++)
        for(int i=0;i<=n+1;i++)
            dp[j][i]=dp[j-1][dp[j-1][i]];
    f[{0,n+1}]=jaxi;
    int have=jaxi;
    setik.insert({0,n+1});
    vector<int> sol;
    for(int who=1;who<=n&&sol.size()<k;who++)
    {
        int poz=where[who];
        auto it=prev(setik.upper_bound({poz,0}));
        int st=(*it).first;
        int dr=(*it).second;
        if(v[st].r<=v[poz].l&&v[poz].r<=v[dr].l)
        {
            int add=-f[{st,dr}];
            add+=getval(st,poz);
            add+=getval(poz,dr);
            add++;
            if(have+add>=k)
            {
                have+=add;
                setik.erase(it);
                setik.insert({st,poz});
                setik.insert({poz,dr});
                f[{st,poz}]=getval(st,poz);
                f[{poz,dr}]=getval(poz,dr);
                sol.push_back(who);
            }
        }
    }
    for(int i:sol)
        cout<<i<<'\n';
    return 0;
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:112:37: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  112 |     for(int who=1;who<=n&&sol.size()<k;who++)
      |                           ~~~~~~~~~~^~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 18780 KB Output is correct
2 Correct 2 ms 18780 KB Output is correct
3 Correct 2 ms 18780 KB Output is correct
4 Correct 116 ms 36028 KB Output is correct
5 Correct 117 ms 37200 KB Output is correct
6 Correct 114 ms 36296 KB Output is correct
7 Correct 100 ms 34656 KB Output is correct
8 Correct 116 ms 37912 KB Output is correct
9 Correct 113 ms 37120 KB Output is correct
10 Correct 112 ms 36368 KB Output is correct
11 Correct 102 ms 34732 KB Output is correct
12 Correct 89 ms 31952 KB Output is correct
13 Correct 84 ms 31072 KB Output is correct
14 Correct 77 ms 30416 KB Output is correct
15 Correct 72 ms 29392 KB Output is correct
16 Correct 44 ms 23376 KB Output is correct
17 Correct 43 ms 23048 KB Output is correct
18 Correct 40 ms 22868 KB Output is correct
19 Correct 34 ms 21340 KB Output is correct
20 Correct 34 ms 21340 KB Output is correct
21 Correct 43 ms 21352 KB Output is correct
22 Correct 42 ms 21096 KB Output is correct
23 Correct 38 ms 21120 KB Output is correct
24 Correct 33 ms 21084 KB Output is correct
25 Correct 35 ms 21004 KB Output is correct
26 Correct 34 ms 21084 KB Output is correct
27 Correct 35 ms 21036 KB Output is correct
28 Correct 19 ms 4620 KB Output is correct
29 Correct 20 ms 4620 KB Output is correct
30 Correct 19 ms 4444 KB Output is correct
31 Correct 20 ms 4440 KB Output is correct
32 Correct 21 ms 4444 KB Output is correct
33 Correct 27 ms 4824 KB Output is correct
34 Correct 61 ms 27264 KB Output is correct
35 Correct 49 ms 25368 KB Output is correct
36 Correct 38 ms 23052 KB Output is correct
37 Correct 77 ms 30176 KB Output is correct
38 Correct 72 ms 29744 KB Output is correct
39 Correct 72 ms 29388 KB Output is correct
40 Correct 72 ms 29172 KB Output is correct
41 Correct 74 ms 28788 KB Output is correct
42 Correct 23 ms 4456 KB Output is correct
43 Correct 78 ms 29676 KB Output is correct
44 Correct 88 ms 29544 KB Output is correct
45 Correct 74 ms 29140 KB Output is correct
46 Correct 73 ms 28628 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 18776 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 2 ms 18780 KB Output is correct
4 Correct 2 ms 18780 KB Output is correct
5 Correct 3 ms 18780 KB Output is correct
6 Correct 2 ms 19032 KB Output is correct
7 Correct 2 ms 18780 KB Output is correct
8 Correct 2 ms 18780 KB Output is correct
9 Correct 2 ms 18776 KB Output is correct
10 Correct 2 ms 18780 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 2 ms 18776 KB Output is correct
13 Correct 3 ms 18780 KB Output is correct
14 Correct 2 ms 18780 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 2 ms 18780 KB Output is correct
17 Correct 3 ms 18780 KB Output is correct
18 Correct 2 ms 18780 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 18780 KB Output is correct
22 Correct 2 ms 18776 KB Output is correct
23 Correct 3 ms 18780 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 2 ms 18780 KB Output is correct
27 Correct 2 ms 18780 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 18776 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 2 ms 18780 KB Output is correct
4 Correct 2 ms 18780 KB Output is correct
5 Correct 3 ms 18780 KB Output is correct
6 Correct 2 ms 19032 KB Output is correct
7 Correct 2 ms 18780 KB Output is correct
8 Correct 2 ms 18780 KB Output is correct
9 Correct 2 ms 18776 KB Output is correct
10 Correct 2 ms 18780 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 2 ms 18776 KB Output is correct
13 Correct 3 ms 18780 KB Output is correct
14 Correct 2 ms 18780 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 2 ms 18780 KB Output is correct
17 Correct 3 ms 18780 KB Output is correct
18 Correct 2 ms 18780 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 18780 KB Output is correct
22 Correct 2 ms 18776 KB Output is correct
23 Correct 3 ms 18780 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 2 ms 18780 KB Output is correct
27 Correct 2 ms 18780 KB Output is correct
28 Correct 3 ms 18780 KB Output is correct
29 Correct 3 ms 18776 KB Output is correct
30 Correct 3 ms 18780 KB Output is correct
31 Correct 3 ms 18780 KB Output is correct
32 Correct 3 ms 18780 KB Output is correct
33 Correct 1 ms 356 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 6 ms 19292 KB Output is correct
36 Correct 6 ms 19292 KB Output is correct
37 Correct 5 ms 19220 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 6 ms 19292 KB Output is correct
40 Correct 5 ms 19292 KB Output is correct
41 Correct 5 ms 19292 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 5 ms 19036 KB Output is correct
44 Correct 4 ms 19036 KB Output is correct
45 Correct 4 ms 19000 KB Output is correct
46 Correct 1 ms 348 KB Output is correct
47 Correct 3 ms 18780 KB Output is correct
48 Correct 5 ms 18780 KB Output is correct
49 Correct 4 ms 18780 KB Output is correct
50 Correct 1 ms 348 KB Output is correct
51 Correct 3 ms 18776 KB Output is correct
52 Correct 3 ms 18780 KB Output is correct
53 Correct 3 ms 18780 KB Output is correct
54 Correct 1 ms 348 KB Output is correct
55 Correct 5 ms 19288 KB Output is correct
56 Correct 5 ms 19544 KB Output is correct
57 Correct 5 ms 19292 KB Output is correct
58 Correct 5 ms 19292 KB Output is correct
59 Correct 5 ms 19292 KB Output is correct
60 Correct 5 ms 19292 KB Output is correct
61 Correct 5 ms 19292 KB Output is correct
62 Correct 4 ms 19292 KB Output is correct
63 Correct 5 ms 19292 KB Output is correct
64 Correct 1 ms 348 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 18780 KB Output is correct
2 Correct 2 ms 18780 KB Output is correct
3 Correct 2 ms 18780 KB Output is correct
4 Correct 116 ms 36028 KB Output is correct
5 Correct 117 ms 37200 KB Output is correct
6 Correct 114 ms 36296 KB Output is correct
7 Correct 100 ms 34656 KB Output is correct
8 Correct 116 ms 37912 KB Output is correct
9 Correct 113 ms 37120 KB Output is correct
10 Correct 112 ms 36368 KB Output is correct
11 Correct 102 ms 34732 KB Output is correct
12 Correct 89 ms 31952 KB Output is correct
13 Correct 84 ms 31072 KB Output is correct
14 Correct 77 ms 30416 KB Output is correct
15 Correct 72 ms 29392 KB Output is correct
16 Correct 44 ms 23376 KB Output is correct
17 Correct 43 ms 23048 KB Output is correct
18 Correct 40 ms 22868 KB Output is correct
19 Correct 34 ms 21340 KB Output is correct
20 Correct 34 ms 21340 KB Output is correct
21 Correct 43 ms 21352 KB Output is correct
22 Correct 42 ms 21096 KB Output is correct
23 Correct 38 ms 21120 KB Output is correct
24 Correct 33 ms 21084 KB Output is correct
25 Correct 35 ms 21004 KB Output is correct
26 Correct 34 ms 21084 KB Output is correct
27 Correct 35 ms 21036 KB Output is correct
28 Correct 19 ms 4620 KB Output is correct
29 Correct 20 ms 4620 KB Output is correct
30 Correct 19 ms 4444 KB Output is correct
31 Correct 20 ms 4440 KB Output is correct
32 Correct 21 ms 4444 KB Output is correct
33 Correct 27 ms 4824 KB Output is correct
34 Correct 61 ms 27264 KB Output is correct
35 Correct 49 ms 25368 KB Output is correct
36 Correct 38 ms 23052 KB Output is correct
37 Correct 77 ms 30176 KB Output is correct
38 Correct 72 ms 29744 KB Output is correct
39 Correct 72 ms 29388 KB Output is correct
40 Correct 72 ms 29172 KB Output is correct
41 Correct 74 ms 28788 KB Output is correct
42 Correct 23 ms 4456 KB Output is correct
43 Correct 78 ms 29676 KB Output is correct
44 Correct 88 ms 29544 KB Output is correct
45 Correct 74 ms 29140 KB Output is correct
46 Correct 73 ms 28628 KB Output is correct
47 Correct 2 ms 18776 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 2 ms 18780 KB Output is correct
50 Correct 2 ms 18780 KB Output is correct
51 Correct 3 ms 18780 KB Output is correct
52 Correct 2 ms 19032 KB Output is correct
53 Correct 2 ms 18780 KB Output is correct
54 Correct 2 ms 18780 KB Output is correct
55 Correct 2 ms 18776 KB Output is correct
56 Correct 2 ms 18780 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 2 ms 18776 KB Output is correct
59 Correct 3 ms 18780 KB Output is correct
60 Correct 2 ms 18780 KB Output is correct
61 Correct 1 ms 348 KB Output is correct
62 Correct 2 ms 18780 KB Output is correct
63 Correct 3 ms 18780 KB Output is correct
64 Correct 2 ms 18780 KB Output is correct
65 Correct 1 ms 600 KB Output is correct
66 Correct 0 ms 348 KB Output is correct
67 Correct 2 ms 18780 KB Output is correct
68 Correct 2 ms 18776 KB Output is correct
69 Correct 3 ms 18780 KB Output is correct
70 Correct 0 ms 348 KB Output is correct
71 Correct 1 ms 348 KB Output is correct
72 Correct 2 ms 18780 KB Output is correct
73 Correct 2 ms 18780 KB Output is correct
74 Correct 3 ms 18780 KB Output is correct
75 Correct 3 ms 18776 KB Output is correct
76 Correct 3 ms 18780 KB Output is correct
77 Correct 3 ms 18780 KB Output is correct
78 Correct 3 ms 18780 KB Output is correct
79 Correct 1 ms 356 KB Output is correct
80 Correct 1 ms 348 KB Output is correct
81 Correct 6 ms 19292 KB Output is correct
82 Correct 6 ms 19292 KB Output is correct
83 Correct 5 ms 19220 KB Output is correct
84 Correct 1 ms 348 KB Output is correct
85 Correct 6 ms 19292 KB Output is correct
86 Correct 5 ms 19292 KB Output is correct
87 Correct 5 ms 19292 KB Output is correct
88 Correct 1 ms 348 KB Output is correct
89 Correct 5 ms 19036 KB Output is correct
90 Correct 4 ms 19036 KB Output is correct
91 Correct 4 ms 19000 KB Output is correct
92 Correct 1 ms 348 KB Output is correct
93 Correct 3 ms 18780 KB Output is correct
94 Correct 5 ms 18780 KB Output is correct
95 Correct 4 ms 18780 KB Output is correct
96 Correct 1 ms 348 KB Output is correct
97 Correct 3 ms 18776 KB Output is correct
98 Correct 3 ms 18780 KB Output is correct
99 Correct 3 ms 18780 KB Output is correct
100 Correct 1 ms 348 KB Output is correct
101 Correct 5 ms 19288 KB Output is correct
102 Correct 5 ms 19544 KB Output is correct
103 Correct 5 ms 19292 KB Output is correct
104 Correct 5 ms 19292 KB Output is correct
105 Correct 5 ms 19292 KB Output is correct
106 Correct 5 ms 19292 KB Output is correct
107 Correct 5 ms 19292 KB Output is correct
108 Correct 4 ms 19292 KB Output is correct
109 Correct 5 ms 19292 KB Output is correct
110 Correct 1 ms 348 KB Output is correct
111 Correct 40 ms 21060 KB Output is correct
112 Correct 41 ms 21208 KB Output is correct
113 Correct 46 ms 20996 KB Output is correct
114 Correct 44 ms 21148 KB Output is correct
115 Correct 38 ms 21072 KB Output is correct
116 Correct 24 ms 4444 KB Output is correct
117 Correct 25 ms 4444 KB Output is correct
118 Correct 209 ms 38088 KB Output is correct
119 Correct 204 ms 36220 KB Output is correct
120 Correct 109 ms 29392 KB Output is correct
121 Correct 26 ms 4624 KB Output is correct
122 Correct 165 ms 31432 KB Output is correct
123 Correct 141 ms 30484 KB Output is correct
124 Correct 109 ms 29388 KB Output is correct
125 Correct 24 ms 4440 KB Output is correct
126 Correct 70 ms 23452 KB Output is correct
127 Correct 65 ms 23120 KB Output is correct
128 Correct 62 ms 22868 KB Output is correct
129 Correct 24 ms 4440 KB Output is correct
130 Correct 47 ms 21332 KB Output is correct
131 Correct 45 ms 21396 KB Output is correct
132 Correct 44 ms 21352 KB Output is correct
133 Correct 24 ms 4440 KB Output is correct
134 Correct 41 ms 21000 KB Output is correct
135 Correct 41 ms 21076 KB Output is correct
136 Correct 44 ms 21080 KB Output is correct
137 Correct 24 ms 4604 KB Output is correct
138 Correct 38 ms 21084 KB Output is correct
139 Correct 50 ms 21156 KB Output is correct
140 Correct 36 ms 21072 KB Output is correct
141 Correct 24 ms 4456 KB Output is correct
142 Correct 127 ms 39248 KB Output is correct
143 Correct 123 ms 39368 KB Output is correct
144 Correct 131 ms 39256 KB Output is correct
145 Correct 116 ms 39068 KB Output is correct
146 Correct 112 ms 38604 KB Output is correct
147 Correct 114 ms 38256 KB Output is correct
148 Correct 110 ms 38092 KB Output is correct
149 Correct 114 ms 37692 KB Output is correct
150 Correct 107 ms 37284 KB Output is correct
151 Correct 96 ms 35444 KB Output is correct
152 Correct 19 ms 4444 KB Output is correct
153 Correct 113 ms 39216 KB Output is correct
154 Correct 129 ms 38856 KB Output is correct
155 Correct 108 ms 38344 KB Output is correct
156 Correct 112 ms 38084 KB Output is correct
157 Correct 105 ms 37840 KB Output is correct
158 Correct 128 ms 37320 KB Output is correct
159 Correct 94 ms 35612 KB Output is correct
160 Correct 20 ms 4444 KB Output is correct
161 Correct 135 ms 30160 KB Output is correct
162 Correct 125 ms 29816 KB Output is correct
163 Correct 146 ms 29400 KB Output is correct
164 Correct 129 ms 29064 KB Output is correct
165 Correct 104 ms 28792 KB Output is correct
166 Correct 24 ms 4444 KB Output is correct
167 Correct 78 ms 29904 KB Output is correct
168 Correct 76 ms 29500 KB Output is correct
169 Correct 74 ms 29132 KB Output is correct
170 Correct 73 ms 28804 KB Output is correct
171 Correct 73 ms 29392 KB Output is correct
172 Correct 82 ms 30164 KB Output is correct
173 Correct 128 ms 30264 KB Output is correct
174 Correct 130 ms 30156 KB Output is correct
175 Correct 139 ms 29896 KB Output is correct
176 Correct 112 ms 28460 KB Output is correct