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Submission #602688

# Submission time Handle Problem Language Result Execution time Memory
602688 2022-07-23T10:10:11 Z almothana05 Event Hopping (BOI22_events) C++14
100 / 100
 1223 ms 46988 KB 
#include<bits/stdc++.h>
#define mod 1000000007
using namespace std;
vector<vector<int> >num;
vector<pair<int , int > >cmp;
vector<int>pow2;
int ind[200000] , platz[200000];
int lift[300000][20], seg[20][800000];
unordered_map<int , int>trans;
int sucher(int id , int l , int r , int gewl , int gewr , int ver){
    if(gewl > r || l > gewr){
        return mod;
    }
    if(gewl <= l && r <= gewr){
        return seg[ver][id];
    }
    int m = (l + r)/2;
    return min(sucher(id * 2 , l , m , gewl , gewr , ver) , sucher(id * 2 + 1 , m + 1 , r , gewl ,gewr , ver));
}
int main(){
    int menge , numm , nummer , que , len;
    cin >> menge >> que;
    for(int i = 1 ; i < 1000000 ; i*= 2){
        pow2.push_back(i);
    }
    for(len = 1 ; len < 100000 ; len *= 2);
    for(int i = 0 ; i < menge ; i++){
        platz[i + 1]  = -1;
        cin >> numm >> nummer;
        num.push_back({nummer , numm , i + 1});
        cmp.push_back({numm , 0});
        cmp.push_back({nummer , 1});
    }
    int pl = 0;// does matter sort begin?
    sort(cmp.begin() , cmp.end());
    sort(num.begin() , num.end());
    for(int i = cmp.size() - 1 ; i >= 0; i--){
        if(trans[cmp[i].first] == 0 && cmp[i].second == 1){
            // cout << cmp[i].first << ' ';
            pl++;
        }//////////////////////////////////////////////////////////////
        trans[cmp[i].first] = pl;
    }
    pl++;
    // cout << "\n";
    for(int i = 0 ; i < num.size() ; i++){
        // cout << num[i][0] << ' ' << num[i][1] << "\n";
        num[i][0] = pl - trans[num[i][0]];
        num[i][1] = pl - trans[num[i][1]];
        ind[num[i][2]] = i;
        if(platz[num[i][0]] == -1){
            platz[num[i][0]] = i;
        }
        lift[i][0] = num[i][1];
        // cout << num[i][0]<< ' ' << num[i][1]<< "\n\n";
    }
    for(int i = 1 ; i < 20 ; i++){
        // cout << i << ' ';
        for(int j = 0 ; j < 100000; j++){
            seg[i - 1][j + len] = lift[j][i - 1];
        }
        for(int j = len - 1 ; j > 0 ; j--){
            seg[i - 1][j] = min(seg[i - 1][j * 2] , seg[i - 1][j * 2 + 1]);
        }
        for(int j = 0 ; j < num.size(); j++){
            lift[j][i] = sucher(1 , 1 , len , platz[lift[j][i - 1]] + 1 , j + 1 , i - 1);
        }
        // cout << i  << " \n";
    }
    // for(int i = 0 ; i < menge ; i++){
    //     for(int j = 0 ; j < 20 ; j++){
    //         cout << lift[i][j] << ' ';
    //     }
    //     cout << "\n";
    // }
    int erg;
    while(que--){
        erg = 0;
        cin >> numm >> nummer;
        if(numm == nummer){
            cout << 0 << "\n";
            continue;
        }
        numm = ind[numm];
        nummer = ind[nummer];
        // cout << numm <<' ' << nummer  << "\n";
        if(num[numm][0] > num[nummer][0]){
            cout << "impossible\n";
            continue;
        }
        int be = nummer , en = nummer;
        for(int i = 19 ; i >= 0 ; i--){
            int comp = sucher(1 , 1, len , be + 1 , en + 1 , i ) ;
                // cout << comp << " ";
            if( comp > num[numm][0]){
                // cout << i << ' ' ;
                erg += pow2[i];
                be = platz[comp];
            }
        }
        // cout << "\n";
        // cout <<  nummer << " \n";
        be = platz[sucher(1 , 1, len , be + 1 , en + 1 , 0 )];
        // cout << numm << ' ' << be << ' ' << en << "\n";
        if(numm >= be){
            cout << erg + 1 << "\n";
        }
        else{
            cout << "impossible\n";
        }
    }
}

Compilation message

events.cpp: In function 'int main()':
events.cpp:46:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for(int i = 0 ; i < num.size() ; i++){
      |                     ~~^~~~~~~~~~~~
events.cpp:65:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for(int j = 0 ; j < num.size(); j++){
      |                         ~~^~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 17620 KB Output is correct
2 Correct 986 ms 38776 KB Output is correct
3 Correct 1065 ms 38624 KB Output is correct
4 Correct 1077 ms 38592 KB Output is correct
5 Correct 1095 ms 38828 KB Output is correct
6 Correct 1051 ms 39084 KB Output is correct
7 Correct 1033 ms 39388 KB Output is correct
8 Correct 799 ms 43868 KB Output is correct
9 Correct 811 ms 43920 KB Output is correct
10 Correct 967 ms 39148 KB Output is correct
11 Correct 944 ms 40120 KB Output is correct
12 Correct 687 ms 39056 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 17620 KB Output is correct
2 Correct 12 ms 17592 KB Output is correct
3 Correct 16 ms 17848 KB Output is correct
4 Correct 16 ms 17784 KB Output is correct
5 Correct 16 ms 17876 KB Output is correct
6 Correct 19 ms 17792 KB Output is correct
7 Correct 15 ms 17856 KB Output is correct
8 Correct 16 ms 17872 KB Output is correct
9 Correct 15 ms 17792 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 17620 KB Output is correct
2 Correct 12 ms 17592 KB Output is correct
3 Correct 16 ms 17848 KB Output is correct
4 Correct 16 ms 17784 KB Output is correct
5 Correct 16 ms 17876 KB Output is correct
6 Correct 19 ms 17792 KB Output is correct
7 Correct 15 ms 17856 KB Output is correct
8 Correct 16 ms 17872 KB Output is correct
9 Correct 15 ms 17792 KB Output is correct
10 Correct 12 ms 17620 KB Output is correct
11 Correct 11 ms 17620 KB Output is correct
12 Correct 18 ms 17876 KB Output is correct
13 Correct 16 ms 17876 KB Output is correct
14 Correct 16 ms 17876 KB Output is correct
15 Correct 16 ms 17824 KB Output is correct
16 Correct 16 ms 17876 KB Output is correct
17 Correct 19 ms 17820 KB Output is correct
18 Correct 16 ms 17764 KB Output is correct
19 Correct 522 ms 20184 KB Output is correct
20 Correct 557 ms 20160 KB Output is correct
21 Correct 376 ms 20516 KB Output is correct
22 Correct 326 ms 20492 KB Output is correct
23 Correct 315 ms 20504 KB Output is correct
24 Correct 304 ms 20528 KB Output is correct
25 Correct 483 ms 20076 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 17620 KB Output is correct
2 Correct 12 ms 17592 KB Output is correct
3 Correct 16 ms 17848 KB Output is correct
4 Correct 16 ms 17784 KB Output is correct
5 Correct 16 ms 17876 KB Output is correct
6 Correct 19 ms 17792 KB Output is correct
7 Correct 15 ms 17856 KB Output is correct
8 Correct 16 ms 17872 KB Output is correct
9 Correct 15 ms 17792 KB Output is correct
10 Correct 13 ms 17620 KB Output is correct
11 Correct 12 ms 17620 KB Output is correct
12 Correct 16 ms 17836 KB Output is correct
13 Correct 17 ms 17784 KB Output is correct
14 Correct 17 ms 17768 KB Output is correct
15 Correct 16 ms 17876 KB Output is correct
16 Correct 17 ms 17876 KB Output is correct
17 Correct 16 ms 17912 KB Output is correct
18 Correct 16 ms 17748 KB Output is correct
19 Correct 467 ms 39996 KB Output is correct
20 Correct 430 ms 39064 KB Output is correct
21 Correct 416 ms 39664 KB Output is correct
22 Correct 470 ms 40644 KB Output is correct
23 Correct 441 ms 44612 KB Output is correct
24 Correct 476 ms 44700 KB Output is correct
25 Correct 327 ms 34448 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 997 ms 38612 KB Output is correct
2 Correct 1071 ms 38564 KB Output is correct
3 Correct 1125 ms 38592 KB Output is correct
4 Correct 825 ms 43892 KB Output is correct
5 Correct 1059 ms 38968 KB Output is correct
6 Correct 1099 ms 43496 KB Output is correct
7 Correct 1223 ms 43568 KB Output is correct
8 Correct 1222 ms 43644 KB Output is correct
9 Correct 507 ms 42836 KB Output is correct
10 Correct 1181 ms 43208 KB Output is correct
11 Correct 1056 ms 43056 KB Output is correct
12 Correct 1096 ms 43216 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 17620 KB Output is correct
2 Correct 986 ms 38776 KB Output is correct
3 Correct 1065 ms 38624 KB Output is correct
4 Correct 1077 ms 38592 KB Output is correct
5 Correct 1095 ms 38828 KB Output is correct
6 Correct 1051 ms 39084 KB Output is correct
7 Correct 1033 ms 39388 KB Output is correct
8 Correct 799 ms 43868 KB Output is correct
9 Correct 811 ms 43920 KB Output is correct
10 Correct 967 ms 39148 KB Output is correct
11 Correct 944 ms 40120 KB Output is correct
12 Correct 687 ms 39056 KB Output is correct
13 Correct 11 ms 17620 KB Output is correct
14 Correct 12 ms 17592 KB Output is correct
15 Correct 16 ms 17848 KB Output is correct
16 Correct 16 ms 17784 KB Output is correct
17 Correct 16 ms 17876 KB Output is correct
18 Correct 19 ms 17792 KB Output is correct
19 Correct 15 ms 17856 KB Output is correct
20 Correct 16 ms 17872 KB Output is correct
21 Correct 15 ms 17792 KB Output is correct
22 Correct 12 ms 17620 KB Output is correct
23 Correct 11 ms 17620 KB Output is correct
24 Correct 18 ms 17876 KB Output is correct
25 Correct 16 ms 17876 KB Output is correct
26 Correct 16 ms 17876 KB Output is correct
27 Correct 16 ms 17824 KB Output is correct
28 Correct 16 ms 17876 KB Output is correct
29 Correct 19 ms 17820 KB Output is correct
30 Correct 16 ms 17764 KB Output is correct
31 Correct 522 ms 20184 KB Output is correct
32 Correct 557 ms 20160 KB Output is correct
33 Correct 376 ms 20516 KB Output is correct
34 Correct 326 ms 20492 KB Output is correct
35 Correct 315 ms 20504 KB Output is correct
36 Correct 304 ms 20528 KB Output is correct
37 Correct 483 ms 20076 KB Output is correct
38 Correct 13 ms 17620 KB Output is correct
39 Correct 12 ms 17620 KB Output is correct
40 Correct 16 ms 17836 KB Output is correct
41 Correct 17 ms 17784 KB Output is correct
42 Correct 17 ms 17768 KB Output is correct
43 Correct 16 ms 17876 KB Output is correct
44 Correct 17 ms 17876 KB Output is correct
45 Correct 16 ms 17912 KB Output is correct
46 Correct 16 ms 17748 KB Output is correct
47 Correct 467 ms 39996 KB Output is correct
48 Correct 430 ms 39064 KB Output is correct
49 Correct 416 ms 39664 KB Output is correct
50 Correct 470 ms 40644 KB Output is correct
51 Correct 441 ms 44612 KB Output is correct
52 Correct 476 ms 44700 KB Output is correct
53 Correct 327 ms 34448 KB Output is correct
54 Correct 997 ms 38612 KB Output is correct
55 Correct 1071 ms 38564 KB Output is correct
56 Correct 1125 ms 38592 KB Output is correct
57 Correct 825 ms 43892 KB Output is correct
58 Correct 1059 ms 38968 KB Output is correct
59 Correct 1099 ms 43496 KB Output is correct
60 Correct 1223 ms 43568 KB Output is correct
61 Correct 1222 ms 43644 KB Output is correct
62 Correct 507 ms 42836 KB Output is correct
63 Correct 1181 ms 43208 KB Output is correct
64 Correct 1056 ms 43056 KB Output is correct
65 Correct 1096 ms 43216 KB Output is correct
66 Correct 16 ms 17620 KB Output is correct
67 Correct 1048 ms 41572 KB Output is correct
68 Correct 1051 ms 41664 KB Output is correct
69 Correct 1063 ms 41600 KB Output is correct
70 Correct 1061 ms 41932 KB Output is correct
71 Correct 1042 ms 42284 KB Output is correct
72 Correct 1057 ms 42308 KB Output is correct
73 Correct 795 ms 46988 KB Output is correct
74 Correct 799 ms 46932 KB Output is correct
75 Correct 983 ms 42064 KB Output is correct
76 Correct 958 ms 43148 KB Output is correct
77 Correct 681 ms 41348 KB Output is correct
78 Correct 12 ms 17620 KB Output is correct
79 Correct 17 ms 17852 KB Output is correct
80 Correct 17 ms 17864 KB Output is correct
81 Correct 16 ms 17876 KB Output is correct
82 Correct 19 ms 17876 KB Output is correct
83 Correct 15 ms 17876 KB Output is correct
84 Correct 16 ms 17848 KB Output is correct
85 Correct 15 ms 17748 KB Output is correct
86 Correct 514 ms 20224 KB Output is correct
87 Correct 572 ms 20116 KB Output is correct
88 Correct 387 ms 20424 KB Output is correct
89 Correct 338 ms 20444 KB Output is correct
90 Correct 309 ms 20544 KB Output is correct
91 Correct 313 ms 20492 KB Output is correct
92 Correct 477 ms 20112 KB Output is correct
93 Correct 459 ms 40080 KB Output is correct
94 Correct 435 ms 39164 KB Output is correct
95 Correct 421 ms 39992 KB Output is correct
96 Correct 476 ms 40800 KB Output is correct
97 Correct 427 ms 44720 KB Output is correct
98 Correct 490 ms 44708 KB Output is correct
99 Correct 330 ms 34552 KB Output is correct
100 Correct 988 ms 46536 KB Output is correct
101 Correct 1004 ms 46596 KB Output is correct
102 Correct 1020 ms 46696 KB Output is correct
103 Correct 995 ms 46204 KB Output is correct
104 Correct 847 ms 45940 KB Output is correct
105 Correct 994 ms 46204 KB Output is correct
106 Correct 888 ms 39436 KB Output is correct
107 Correct 1004 ms 41400 KB Output is correct
108 Correct 848 ms 41816 KB Output is correct
109 Correct 816 ms 41664 KB Output is correct
110 Correct 823 ms 46680 KB Output is correct
111 Correct 820 ms 46740 KB Output is correct