oj.uz

Submission #991908

# Submission time Handle Problem Language Result Execution time Memory
991908 2024-06-03T11:26:56 Z isaachew Event Hopping 2 (JOI21_event2) C++17
100 / 100
 2346 ms 112580 KB 
#include <bits/stdc++.h>
/*
 Check if each can be done with binary lifting
 */
std::vector<std::pair<int,int>> times;
std::map<int,int> bests;//next end for each end
std::vector<std::map<int,int>> bestns;//binlift based on end point
int getevs(int st,int et){
    if(st>et)return -1000000000;//not possible
    int curevs=0;
    for(int i=20;i--;){
        int neind=bestns[i].lower_bound(st)->second;
        if(neind==-1)continue;
        int nst=times[neind].second;
        if(nst>et)continue;
        curevs+=1<<i;
        st=nst;
    }
    return curevs;
}
int main(){
    int n,k;
    std::cin>>n>>k;
    
    
    std::vector<int> sevents;
    for(int i=0;i<n;i++){
        int a,b;
        std::cin>>a>>b;
        times.push_back({a,b});
        sevents.push_back(i);
    }
    bests[1e9]=-1;
    std::sort(sevents.begin(),sevents.end(),[&](int a,int b){return times[a].first<times[b].first;});
    int minend=1e9;
    int minind=-1;
    for(int i=n;i--;){
        if(times[sevents[i]].second<minend){
            minind=sevents[i];
            minend=times[sevents[i]].second;
        }
        bests[times[sevents[i]].first]=minind;
    }
    bestns.push_back(bests);
    for(int num=0;num<19;num++){
        std::map<int,int> newmap;
        newmap[1e9]=-1;
        for(int i=n;i--;){
            int nextind=bestns[num][times[i].first];//2^num events after this
            int nnextind=nextind==-1?-1:bestns[num].lower_bound(times[nextind].second)->second;
            newmap[times[i].first]=nnextind;
        }
        bestns.push_back(newmap);
    }
    std::vector<int> curset;
    std::set<std::pair<int,int>> curevsts;//{t, start event?}
    curevsts.insert({1000000001,1});//"start of event"
    curevsts.insert({-1,0});//phantom "end of event"
    int curnumevs=getevs(0,1000000000);//initial num evs
    if(curnumevs<k){
        std::cout<<"-1\n";
        return 0;
    }
    for(int i=0;i<n;i++){
        auto startind=curevsts.lower_bound({times[i].first,1});
        auto endind=curevsts.lower_bound({times[i].second,0});
        if(startind!=endind)continue;
        if(startind->second==0)continue;//in an event
        --startind;//first point not in an event
        int pstart=startind->first;
        int pend=endind->first;
        int estart=times[i].first,eend=times[i].second;
        int newnumevs=curnumevs;
        newnumevs-=getevs(pstart,pend);
        newnumevs+=getevs(pstart,estart);
        newnumevs+=getevs(eend,pend);
        newnumevs++;
        if(newnumevs<k)continue;
        curnumevs=newnumevs;
        curevsts.insert({times[i].first,1});
        curevsts.insert({times[i].second,0});
        curset.push_back(i);
    }
    for(int i=0;i<k;i++){
        std::cout<<curset[i]+1<<'\n';
    }
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 945 ms 111704 KB Output is correct
5 Correct 912 ms 111812 KB Output is correct
6 Correct 935 ms 111620 KB Output is correct
7 Correct 913 ms 111556 KB Output is correct
8 Correct 878 ms 111812 KB Output is correct
9 Correct 861 ms 111560 KB Output is correct
10 Correct 899 ms 111560 KB Output is correct
11 Correct 929 ms 111692 KB Output is correct
12 Correct 782 ms 107972 KB Output is correct
13 Correct 795 ms 107932 KB Output is correct
14 Correct 808 ms 107972 KB Output is correct
15 Correct 805 ms 107868 KB Output is correct
16 Correct 612 ms 106692 KB Output is correct
17 Correct 595 ms 106696 KB Output is correct
18 Correct 590 ms 106760 KB Output is correct
19 Correct 517 ms 106696 KB Output is correct
20 Correct 493 ms 106692 KB Output is correct
21 Correct 506 ms 106696 KB Output is correct
22 Correct 483 ms 106848 KB Output is correct
23 Correct 472 ms 106696 KB Output is correct
24 Correct 486 ms 106696 KB Output is correct
25 Correct 471 ms 106752 KB Output is correct
26 Correct 454 ms 106696 KB Output is correct
27 Correct 470 ms 106696 KB Output is correct
28 Correct 546 ms 106696 KB Output is correct
29 Correct 544 ms 106696 KB Output is correct
30 Correct 518 ms 106672 KB Output is correct
31 Correct 478 ms 106696 KB Output is correct
32 Correct 472 ms 106692 KB Output is correct
33 Correct 467 ms 106692 KB Output is correct
34 Correct 794 ms 107976 KB Output is correct
35 Correct 773 ms 107716 KB Output is correct
36 Correct 811 ms 107644 KB Output is correct
37 Correct 734 ms 107356 KB Output is correct
38 Correct 739 ms 107280 KB Output is correct
39 Correct 741 ms 107196 KB Output is correct
40 Correct 757 ms 107208 KB Output is correct
41 Correct 752 ms 107208 KB Output is correct
42 Correct 547 ms 106948 KB Output is correct
43 Correct 748 ms 107204 KB Output is correct
44 Correct 732 ms 106952 KB Output is correct
45 Correct 730 ms 106996 KB Output is correct
46 Correct 711 ms 107204 KB Output is correct

Subtask #2
1.0 / 1.0

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

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 17 ms 3420 KB Output is correct
29 Correct 17 ms 3420 KB Output is correct
30 Correct 17 ms 3420 KB Output is correct
31 Correct 17 ms 3600 KB Output is correct
32 Correct 17 ms 3412 KB Output is correct
33 Correct 16 ms 3420 KB Output is correct
34 Correct 16 ms 3400 KB Output is correct
35 Correct 27 ms 3708 KB Output is correct
36 Correct 27 ms 3644 KB Output is correct
37 Correct 26 ms 3668 KB Output is correct
38 Correct 18 ms 3420 KB Output is correct
39 Correct 26 ms 3676 KB Output is correct
40 Correct 26 ms 3668 KB Output is correct
41 Correct 26 ms 3676 KB Output is correct
42 Correct 18 ms 3532 KB Output is correct
43 Correct 22 ms 3420 KB Output is correct
44 Correct 29 ms 3408 KB Output is correct
45 Correct 21 ms 3420 KB Output is correct
46 Correct 18 ms 3516 KB Output is correct
47 Correct 19 ms 3420 KB Output is correct
48 Correct 18 ms 3420 KB Output is correct
49 Correct 18 ms 3420 KB Output is correct
50 Correct 21 ms 3420 KB Output is correct
51 Correct 17 ms 3532 KB Output is correct
52 Correct 28 ms 3412 KB Output is correct
53 Correct 17 ms 3420 KB Output is correct
54 Correct 17 ms 3420 KB Output is correct
55 Correct 18 ms 3692 KB Output is correct
56 Correct 18 ms 3676 KB Output is correct
57 Correct 17 ms 3676 KB Output is correct
58 Correct 17 ms 3676 KB Output is correct
59 Correct 17 ms 3628 KB Output is correct
60 Correct 17 ms 3676 KB Output is correct
61 Correct 18 ms 3676 KB Output is correct
62 Correct 17 ms 3640 KB Output is correct
63 Correct 18 ms 3676 KB Output is correct
64 Correct 13 ms 3420 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 945 ms 111704 KB Output is correct
5 Correct 912 ms 111812 KB Output is correct
6 Correct 935 ms 111620 KB Output is correct
7 Correct 913 ms 111556 KB Output is correct
8 Correct 878 ms 111812 KB Output is correct
9 Correct 861 ms 111560 KB Output is correct
10 Correct 899 ms 111560 KB Output is correct
11 Correct 929 ms 111692 KB Output is correct
12 Correct 782 ms 107972 KB Output is correct
13 Correct 795 ms 107932 KB Output is correct
14 Correct 808 ms 107972 KB Output is correct
15 Correct 805 ms 107868 KB Output is correct
16 Correct 612 ms 106692 KB Output is correct
17 Correct 595 ms 106696 KB Output is correct
18 Correct 590 ms 106760 KB Output is correct
19 Correct 517 ms 106696 KB Output is correct
20 Correct 493 ms 106692 KB Output is correct
21 Correct 506 ms 106696 KB Output is correct
22 Correct 483 ms 106848 KB Output is correct
23 Correct 472 ms 106696 KB Output is correct
24 Correct 486 ms 106696 KB Output is correct
25 Correct 471 ms 106752 KB Output is correct
26 Correct 454 ms 106696 KB Output is correct
27 Correct 470 ms 106696 KB Output is correct
28 Correct 546 ms 106696 KB Output is correct
29 Correct 544 ms 106696 KB Output is correct
30 Correct 518 ms 106672 KB Output is correct
31 Correct 478 ms 106696 KB Output is correct
32 Correct 472 ms 106692 KB Output is correct
33 Correct 467 ms 106692 KB Output is correct
34 Correct 794 ms 107976 KB Output is correct
35 Correct 773 ms 107716 KB Output is correct
36 Correct 811 ms 107644 KB Output is correct
37 Correct 734 ms 107356 KB Output is correct
38 Correct 739 ms 107280 KB Output is correct
39 Correct 741 ms 107196 KB Output is correct
40 Correct 757 ms 107208 KB Output is correct
41 Correct 752 ms 107208 KB Output is correct
42 Correct 547 ms 106948 KB Output is correct
43 Correct 748 ms 107204 KB Output is correct
44 Correct 732 ms 106952 KB Output is correct
45 Correct 730 ms 106996 KB Output is correct
46 Correct 711 ms 107204 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 1 ms 348 KB Output is correct
49 Correct 1 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 1 ms 348 KB Output is correct
53 Correct 1 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 1 ms 348 KB Output is correct
63 Correct 1 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 1 ms 348 KB Output is correct
66 Correct 0 ms 348 KB Output is correct
67 Correct 0 ms 348 KB Output is correct
68 Correct 0 ms 348 KB Output is correct
69 Correct 0 ms 348 KB Output is correct
70 Correct 1 ms 348 KB Output is correct
71 Correct 1 ms 348 KB Output is correct
72 Correct 0 ms 348 KB Output is correct
73 Correct 0 ms 348 KB Output is correct
74 Correct 17 ms 3420 KB Output is correct
75 Correct 17 ms 3420 KB Output is correct
76 Correct 17 ms 3420 KB Output is correct
77 Correct 17 ms 3600 KB Output is correct
78 Correct 17 ms 3412 KB Output is correct
79 Correct 16 ms 3420 KB Output is correct
80 Correct 16 ms 3400 KB Output is correct
81 Correct 27 ms 3708 KB Output is correct
82 Correct 27 ms 3644 KB Output is correct
83 Correct 26 ms 3668 KB Output is correct
84 Correct 18 ms 3420 KB Output is correct
85 Correct 26 ms 3676 KB Output is correct
86 Correct 26 ms 3668 KB Output is correct
87 Correct 26 ms 3676 KB Output is correct
88 Correct 18 ms 3532 KB Output is correct
89 Correct 22 ms 3420 KB Output is correct
90 Correct 29 ms 3408 KB Output is correct
91 Correct 21 ms 3420 KB Output is correct
92 Correct 18 ms 3516 KB Output is correct
93 Correct 19 ms 3420 KB Output is correct
94 Correct 18 ms 3420 KB Output is correct
95 Correct 18 ms 3420 KB Output is correct
96 Correct 21 ms 3420 KB Output is correct
97 Correct 17 ms 3532 KB Output is correct
98 Correct 28 ms 3412 KB Output is correct
99 Correct 17 ms 3420 KB Output is correct
100 Correct 17 ms 3420 KB Output is correct
101 Correct 18 ms 3692 KB Output is correct
102 Correct 18 ms 3676 KB Output is correct
103 Correct 17 ms 3676 KB Output is correct
104 Correct 17 ms 3676 KB Output is correct
105 Correct 17 ms 3628 KB Output is correct
106 Correct 17 ms 3676 KB Output is correct
107 Correct 18 ms 3676 KB Output is correct
108 Correct 17 ms 3640 KB Output is correct
109 Correct 18 ms 3676 KB Output is correct
110 Correct 13 ms 3420 KB Output is correct
111 Correct 1421 ms 106692 KB Output is correct
112 Correct 1337 ms 106644 KB Output is correct
113 Correct 1276 ms 106628 KB Output is correct
114 Correct 1284 ms 106700 KB Output is correct
115 Correct 1241 ms 106696 KB Output is correct
116 Correct 1198 ms 106692 KB Output is correct
117 Correct 1247 ms 106628 KB Output is correct
118 Correct 2346 ms 111816 KB Output is correct
119 Correct 2288 ms 111560 KB Output is correct
120 Correct 1973 ms 107720 KB Output is correct
121 Correct 1451 ms 106696 KB Output is correct
122 Correct 2017 ms 107976 KB Output is correct
123 Correct 2015 ms 107780 KB Output is correct
124 Correct 1989 ms 107716 KB Output is correct
125 Correct 1455 ms 106868 KB Output is correct
126 Correct 1662 ms 106932 KB Output is correct
127 Correct 1591 ms 106952 KB Output is correct
128 Correct 1536 ms 106948 KB Output is correct
129 Correct 1383 ms 106676 KB Output is correct
130 Correct 1459 ms 106640 KB Output is correct
131 Correct 1411 ms 106736 KB Output is correct
132 Correct 1409 ms 106832 KB Output is correct
133 Correct 1300 ms 106692 KB Output is correct
134 Correct 1339 ms 106680 KB Output is correct
135 Correct 1290 ms 106952 KB Output is correct
136 Correct 1243 ms 106688 KB Output is correct
137 Correct 1203 ms 106696 KB Output is correct
138 Correct 1187 ms 107088 KB Output is correct
139 Correct 1208 ms 106776 KB Output is correct
140 Correct 1150 ms 106940 KB Output is correct
141 Correct 1117 ms 106852 KB Output is correct
142 Correct 857 ms 112580 KB Output is correct
143 Correct 850 ms 112408 KB Output is correct
144 Correct 896 ms 112328 KB Output is correct
145 Correct 853 ms 112328 KB Output is correct
146 Correct 862 ms 112324 KB Output is correct
147 Correct 856 ms 112328 KB Output is correct
148 Correct 837 ms 112272 KB Output is correct
149 Correct 872 ms 112288 KB Output is correct
150 Correct 841 ms 112324 KB Output is correct
151 Correct 845 ms 112328 KB Output is correct
152 Correct 525 ms 106692 KB Output is correct
153 Correct 845 ms 112328 KB Output is correct
154 Correct 876 ms 112324 KB Output is correct
155 Correct 868 ms 112324 KB Output is correct
156 Correct 865 ms 112428 KB Output is correct
157 Correct 860 ms 112328 KB Output is correct
158 Correct 861 ms 112324 KB Output is correct
159 Correct 879 ms 112328 KB Output is correct
160 Correct 518 ms 106688 KB Output is correct
161 Correct 1775 ms 107328 KB Output is correct
162 Correct 1806 ms 107528 KB Output is correct
163 Correct 1826 ms 107460 KB Output is correct
164 Correct 1837 ms 107200 KB Output is correct
165 Correct 1801 ms 107476 KB Output is correct
166 Correct 473 ms 106792 KB Output is correct
167 Correct 667 ms 107204 KB Output is correct
168 Correct 644 ms 106948 KB Output is correct
169 Correct 655 ms 106948 KB Output is correct
170 Correct 652 ms 106960 KB Output is correct
171 Correct 721 ms 106588 KB Output is correct
172 Correct 702 ms 107204 KB Output is correct
173 Correct 1995 ms 107536 KB Output is correct
174 Correct 1974 ms 107464 KB Output is correct
175 Correct 1950 ms 107456 KB Output is correct
176 Correct 1825 ms 107252 KB Output is correct