oj.uz

Submission #219101

# Submission time Handle Problem Language Result Execution time Memory
219101 2020-04-03T16:53:35 Z alexandra_udristoiu Making Friends on Joitter is Fun (JOI20_joitter2) C++14
100 / 100
 1760 ms 56084 KB 
#include<iostream>
#include<set>
#include<vector>
#define DIM 100005
using namespace std;
int n, q, i, j, x, y, r1, r2, ry;
long long sol;
int r[DIM], num[DIM], nv[DIM];
vector<int> v[DIM], vr[DIM];
set<int> s[DIM], sr[DIM];
int rad(int x){
    while(r[x] > 0){
        x = r[x];
    }
    return x;
}
void uneste(int r1, int r2){
    int i, j, x, y, rx, ry;
    if(q == 1){
        int abc = 0;
    }
    if(r[r1] > 0 || r[r2] > 0){
        return;
    }
    if(r[r1] > r[r2]){
        swap(r1, r2);
    }
    sol -= num[r1] * 1LL * (num[r1] - 1) + num[r1] * 1LL * nv[r1];
    sol -= num[r2] * 1LL * (num[r2] - 1) + num[r2] * 1LL * nv[r2];
    for(i = 0; i < vr[r2].size(); i++){
        x = vr[r2][i];
        vr[r1].push_back(x);
        if(s[x].find(r1) != s[x].end() ){
            nv[r1]--;
            s[x].erase(r1);
        }
        for(j = 0; j < v[x].size(); j++){
            y = v[x][j];
            ry = rad(y);
            if(ry == r1 || ry == r2){
                s[y].erase(r2);
                continue;
            }
            if(s[y].find(r1) == s[y].end() ){
                s[y].insert(r1);
                nv[r1]++;
            }
            s[y].erase(r2);
            sr[ry].insert(r1);
            sr[ry].erase(r2);
        }
    }
    set<int> :: iterator it;
    for(it = sr[r2].begin(); it != sr[r2].end(); it++){
        sr[r1].insert(*it);
    }
    r[r1] += r[r2];
    r[r2] = r1;
    num[r1] += num[r2];
    sr[r1].erase(r2);
    sol += num[r1] * 1LL * (num[r1] - 1) + num[r1] * 1LL * nv[r1];
    for(it = sr[r2].begin(); it != sr[r2].end(); it++){
        rx = rad(r1);
        ry = rad(*it);
        if(sr[ry].find(rx) != sr[ry].end() && rx != ry){
            uneste(rx, ry);
        }
    }
    for(i = 0; i < vr[r2].size(); i++){
        x = vr[r2][i];
        for(j = 0; j < v[x].size(); j++){
            y = v[x][j];
            rx = rad(r1);
            ry = rad(y);
            if(sr[rx].find(ry) != sr[rx].end() && rx != ry){
                uneste(rx, ry);
            }
        }
    }
}
int main(){
    cin>> n >> q;
    for(i = 1; i <= n; i++){
        r[i] = -1;
        num[i] = 1;
        vr[i].push_back(i);
    }
    for(; q; q--){
        cin>> x >> y;
        v[y].push_back(x);
        r1 = rad(x);
        r2 = rad(y);
        if(r1 == r2){
            cout<< sol <<"\n";
            continue;
        }
        if(s[x].find(r2) == s[x].end() ){
            sol += num[r2];
            nv[r2]++;
            s[x].insert(r2);
        }
        sr[r1].insert(r2);
        if(sr[r2].find(r1) != sr[r2].end() ){
            uneste(r1, r2);
        }
        cout<< sol <<"\n";
    }
}

Compilation message

joitter2.cpp: In function 'void uneste(int, int)':
joitter2.cpp:20:13: warning: unused variable 'abc' [-Wunused-variable]
         int abc = 0;
             ^~~
joitter2.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i = 0; i < vr[r2].size(); i++){
                ~~^~~~~~~~~~~~~~~
joitter2.cpp:37:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j = 0; j < v[x].size(); j++){
                    ~~^~~~~~~~~~~~~
joitter2.cpp:69:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i = 0; i < vr[r2].size(); i++){
                ~~^~~~~~~~~~~~~~~
joitter2.cpp:71:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j = 0; j < v[x].size(); j++){
                    ~~^~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 13 ms 14464 KB Output is correct
3 Correct 13 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 13 ms 14464 KB Output is correct
6 Correct 13 ms 14464 KB Output is correct
7 Correct 20 ms 14464 KB Output is correct
8 Correct 19 ms 14464 KB Output is correct
9 Correct 19 ms 14464 KB Output is correct
10 Correct 13 ms 14464 KB Output is correct
11 Correct 13 ms 14464 KB Output is correct
12 Correct 13 ms 14464 KB Output is correct
13 Correct 14 ms 14592 KB Output is correct
14 Correct 13 ms 14464 KB Output is correct
15 Correct 13 ms 14464 KB Output is correct
16 Correct 13 ms 14464 KB Output is correct
17 Correct 13 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct
19 Correct 13 ms 14464 KB Output is correct
20 Correct 13 ms 14464 KB Output is correct
21 Correct 20 ms 14464 KB Output is correct
22 Correct 14 ms 14464 KB Output is correct
23 Correct 16 ms 14464 KB Output is correct
24 Correct 14 ms 14464 KB Output is correct
25 Correct 18 ms 14508 KB Output is correct
26 Correct 13 ms 14464 KB Output is correct
27 Correct 13 ms 14464 KB Output is correct
28 Correct 17 ms 14464 KB Output is correct
29 Correct 13 ms 14464 KB Output is correct
30 Correct 16 ms 14464 KB Output is correct
31 Correct 18 ms 14464 KB Output is correct
32 Correct 16 ms 14592 KB Output is correct
33 Correct 18 ms 14464 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 13 ms 14464 KB Output is correct
3 Correct 13 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 13 ms 14464 KB Output is correct
6 Correct 13 ms 14464 KB Output is correct
7 Correct 20 ms 14464 KB Output is correct
8 Correct 19 ms 14464 KB Output is correct
9 Correct 19 ms 14464 KB Output is correct
10 Correct 13 ms 14464 KB Output is correct
11 Correct 13 ms 14464 KB Output is correct
12 Correct 13 ms 14464 KB Output is correct
13 Correct 14 ms 14592 KB Output is correct
14 Correct 13 ms 14464 KB Output is correct
15 Correct 13 ms 14464 KB Output is correct
16 Correct 13 ms 14464 KB Output is correct
17 Correct 13 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct
19 Correct 13 ms 14464 KB Output is correct
20 Correct 13 ms 14464 KB Output is correct
21 Correct 20 ms 14464 KB Output is correct
22 Correct 14 ms 14464 KB Output is correct
23 Correct 16 ms 14464 KB Output is correct
24 Correct 14 ms 14464 KB Output is correct
25 Correct 18 ms 14508 KB Output is correct
26 Correct 13 ms 14464 KB Output is correct
27 Correct 13 ms 14464 KB Output is correct
28 Correct 17 ms 14464 KB Output is correct
29 Correct 13 ms 14464 KB Output is correct
30 Correct 16 ms 14464 KB Output is correct
31 Correct 18 ms 14464 KB Output is correct
32 Correct 16 ms 14592 KB Output is correct
33 Correct 18 ms 14464 KB Output is correct
34 Correct 38 ms 14592 KB Output is correct
35 Correct 789 ms 22136 KB Output is correct
36 Correct 845 ms 24568 KB Output is correct
37 Correct 840 ms 24572 KB Output is correct
38 Correct 822 ms 24184 KB Output is correct
39 Correct 25 ms 14720 KB Output is correct
40 Correct 27 ms 14840 KB Output is correct
41 Correct 27 ms 14848 KB Output is correct
42 Correct 29 ms 14840 KB Output is correct
43 Correct 27 ms 14840 KB Output is correct
44 Correct 26 ms 14720 KB Output is correct
45 Correct 25 ms 14720 KB Output is correct
46 Correct 25 ms 14720 KB Output is correct
47 Correct 28 ms 14848 KB Output is correct
48 Correct 27 ms 14848 KB Output is correct
49 Correct 49 ms 15452 KB Output is correct
50 Correct 836 ms 24312 KB Output is correct
51 Correct 43 ms 14976 KB Output is correct
52 Correct 843 ms 23416 KB Output is correct
53 Correct 46 ms 15352 KB Output is correct
54 Correct 824 ms 23904 KB Output is correct
55 Correct 27 ms 14968 KB Output is correct
56 Correct 26 ms 14976 KB Output is correct
57 Correct 27 ms 15232 KB Output is correct
58 Correct 26 ms 15232 KB Output is correct
59 Correct 28 ms 14840 KB Output is correct
60 Correct 844 ms 22264 KB Output is correct
61 Correct 29 ms 14848 KB Output is correct
62 Correct 822 ms 24056 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 13 ms 14464 KB Output is correct
3 Correct 13 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 13 ms 14464 KB Output is correct
6 Correct 13 ms 14464 KB Output is correct
7 Correct 20 ms 14464 KB Output is correct
8 Correct 19 ms 14464 KB Output is correct
9 Correct 19 ms 14464 KB Output is correct
10 Correct 13 ms 14464 KB Output is correct
11 Correct 13 ms 14464 KB Output is correct
12 Correct 13 ms 14464 KB Output is correct
13 Correct 14 ms 14592 KB Output is correct
14 Correct 13 ms 14464 KB Output is correct
15 Correct 13 ms 14464 KB Output is correct
16 Correct 13 ms 14464 KB Output is correct
17 Correct 13 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct
19 Correct 13 ms 14464 KB Output is correct
20 Correct 13 ms 14464 KB Output is correct
21 Correct 20 ms 14464 KB Output is correct
22 Correct 14 ms 14464 KB Output is correct
23 Correct 16 ms 14464 KB Output is correct
24 Correct 14 ms 14464 KB Output is correct
25 Correct 18 ms 14508 KB Output is correct
26 Correct 13 ms 14464 KB Output is correct
27 Correct 13 ms 14464 KB Output is correct
28 Correct 17 ms 14464 KB Output is correct
29 Correct 13 ms 14464 KB Output is correct
30 Correct 16 ms 14464 KB Output is correct
31 Correct 18 ms 14464 KB Output is correct
32 Correct 16 ms 14592 KB Output is correct
33 Correct 18 ms 14464 KB Output is correct
34 Correct 38 ms 14592 KB Output is correct
35 Correct 789 ms 22136 KB Output is correct
36 Correct 845 ms 24568 KB Output is correct
37 Correct 840 ms 24572 KB Output is correct
38 Correct 822 ms 24184 KB Output is correct
39 Correct 25 ms 14720 KB Output is correct
40 Correct 27 ms 14840 KB Output is correct
41 Correct 27 ms 14848 KB Output is correct
42 Correct 29 ms 14840 KB Output is correct
43 Correct 27 ms 14840 KB Output is correct
44 Correct 26 ms 14720 KB Output is correct
45 Correct 25 ms 14720 KB Output is correct
46 Correct 25 ms 14720 KB Output is correct
47 Correct 28 ms 14848 KB Output is correct
48 Correct 27 ms 14848 KB Output is correct
49 Correct 49 ms 15452 KB Output is correct
50 Correct 836 ms 24312 KB Output is correct
51 Correct 43 ms 14976 KB Output is correct
52 Correct 843 ms 23416 KB Output is correct
53 Correct 46 ms 15352 KB Output is correct
54 Correct 824 ms 23904 KB Output is correct
55 Correct 27 ms 14968 KB Output is correct
56 Correct 26 ms 14976 KB Output is correct
57 Correct 27 ms 15232 KB Output is correct
58 Correct 26 ms 15232 KB Output is correct
59 Correct 28 ms 14840 KB Output is correct
60 Correct 844 ms 22264 KB Output is correct
61 Correct 29 ms 14848 KB Output is correct
62 Correct 822 ms 24056 KB Output is correct
63 Correct 1240 ms 55904 KB Output is correct
64 Correct 1252 ms 56084 KB Output is correct
65 Correct 1316 ms 55776 KB Output is correct
66 Correct 753 ms 31444 KB Output is correct
67 Correct 1158 ms 37344 KB Output is correct
68 Correct 701 ms 31844 KB Output is correct
69 Correct 879 ms 32608 KB Output is correct
70 Correct 754 ms 31472 KB Output is correct
71 Correct 746 ms 31472 KB Output is correct
72 Correct 1043 ms 35316 KB Output is correct
73 Correct 1032 ms 35676 KB Output is correct
74 Correct 1760 ms 51184 KB Output is correct
75 Correct 1340 ms 37364 KB Output is correct
76 Correct 1574 ms 44456 KB Output is correct
77 Correct 1507 ms 44568 KB Output is correct
78 Correct 670 ms 32756 KB Output is correct
79 Correct 1247 ms 36368 KB Output is correct
80 Correct 560 ms 32496 KB Output is correct
81 Correct 1068 ms 36924 KB Output is correct
82 Correct 1046 ms 45192 KB Output is correct
83 Correct 1057 ms 45124 KB Output is correct
84 Correct 1020 ms 52712 KB Output is correct
85 Correct 979 ms 52728 KB Output is correct
86 Correct 973 ms 38256 KB Output is correct
87 Correct 1286 ms 40684 KB Output is correct
88 Correct 1032 ms 35444 KB Output is correct
89 Correct 1456 ms 43036 KB Output is correct