oj.uz

Submission #673029

# Submission time Handle Problem Language Result Execution time Memory
673029 2022-12-19T12:24:44 Z JooDdae Bridges (APIO19_bridges) C++17
100 / 100
 2088 ms 9908 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
 
int n, m, q, p[50050], sz[50050], ans[100100];
bool chk[100100], chk2[100100];
 
stack<array<int, 2>> st;
 
int find(int a) {
    if(a == p[a]) return a;
    return find(p[a]);
}
 
bool merge(int a, int b) {
    // cout << a << "+" << b << "\n";
    a = find(a), b = find(b);
    if(a == b) return false;
    if(sz[a] < sz[b]) swap(a, b);
 
    p[b] = a, sz[a] += sz[b];
    st.push({a, b});
    return true;
}
 
int main(){
    cin.tie(0)->sync_with_stdio(0);
    cin >> n >> m;
    vector<array<int, 3>> E(m);
    for(auto &[z, x, y] : E) cin >> x >> y >> z;
 
    cin >> q;
    int s = 1000;
 
    for(int b=0;b<q;b+=s) {
        int k = min(b+s, q) - b;
 
        for(int i=1;i<=n;i++) p[i] = i, sz[i] = 1;
        while(!st.empty()) st.pop();
 
        vector<array<int, 3>> v, v2;
        for(int i=0;i<k;i++) {
            int q, x, y; cin >> q >> x >> y;
 
            if(q == 2) v.push_back({y, x, i});
            else x--, v2.push_back({i, x, y}), chk[x] = 1;
        }
        sort(v.rbegin(), v.rend());
 
        vector<array<int, 3>> e;
        for(int i=0;i<m;i++) if(!chk[i]) e.push_back(E[i]);
        sort(e.rbegin(), e.rend());
 
        int j = 0;
        for(auto [y, x, i] : v) {
            while(j < e.size() && e[j][0] >= y) merge(e[j][1], e[j][2]), j++;
 
            int r = 0;
            while(r < v2.size() && v2[r][0] < i) r++;
            // cout << r << "\n";
 
            int cnt = 0;
            for(int u=r-1;u>=0;u--) if(!chk2[v2[u][1]]) {
                int id = v2[u][1]; chk2[id] = 1;
                if(v2[u][2] >= y) cnt += merge(E[id][1], E[id][2]);
            }
            for(auto [i, id, w] : v2) if(!chk2[id] && E[id][0] >= y) chk2[id] = 1,  cnt += merge(E[id][1], E[id][2]);
 
            ans[b+i] = sz[find(x)];
 
            while(cnt--) {
                auto [x, y] = st.top(); st.pop();
                p[y] = y, sz[x] -= sz[y];
            }
            for(auto [i, id, w] : v2) chk2[id] = 0;
        }
 
        // cout << "reset\n";
        for(auto [i, x, y] : v2) E[x][0] = y, chk[x] = 0;
    }
    
    // cout << "----------\n";
 
    for(int i=0;i<q;i++) if(ans[i]) cout << ans[i] << "\n";
}

Compilation message

bridges.cpp: In function 'int main()':
bridges.cpp:56:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 3> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |             while(j < e.size() && e[j][0] >= y) merge(e[j][1], e[j][2]), j++;
      |                   ~~^~~~~~~~~~
bridges.cpp:59:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 3> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |             while(r < v2.size() && v2[r][0] < i) r++;
      |                   ~~^~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 32 ms 408 KB Output is correct
4 Correct 4 ms 392 KB Output is correct
5 Correct 23 ms 404 KB Output is correct
6 Correct 23 ms 404 KB Output is correct
7 Correct 24 ms 392 KB Output is correct
8 Correct 23 ms 340 KB Output is correct
9 Correct 27 ms 384 KB Output is correct
10 Correct 23 ms 408 KB Output is correct
11 Correct 23 ms 420 KB Output is correct
12 Correct 24 ms 412 KB Output is correct
13 Correct 29 ms 416 KB Output is correct
14 Correct 28 ms 412 KB Output is correct
15 Correct 25 ms 424 KB Output is correct
16 Correct 25 ms 340 KB Output is correct
17 Correct 26 ms 408 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1270 ms 3432 KB Output is correct
2 Correct 1323 ms 3548 KB Output is correct
3 Correct 1291 ms 3536 KB Output is correct
4 Correct 1367 ms 3612 KB Output is correct
5 Correct 1371 ms 3624 KB Output is correct
6 Correct 2059 ms 3748 KB Output is correct
7 Correct 1983 ms 3688 KB Output is correct
8 Correct 2007 ms 3660 KB Output is correct
9 Correct 33 ms 832 KB Output is correct
10 Correct 1470 ms 3524 KB Output is correct
11 Correct 1425 ms 3528 KB Output is correct
12 Correct 1166 ms 4120 KB Output is correct
13 Correct 1164 ms 3420 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1051 ms 2460 KB Output is correct
2 Correct 833 ms 1248 KB Output is correct
3 Correct 1239 ms 2764 KB Output is correct
4 Correct 1008 ms 2536 KB Output is correct
5 Correct 31 ms 844 KB Output is correct
6 Correct 1176 ms 2420 KB Output is correct
7 Correct 967 ms 2544 KB Output is correct
8 Correct 859 ms 2552 KB Output is correct
9 Correct 666 ms 2564 KB Output is correct
10 Correct 622 ms 2720 KB Output is correct
11 Correct 685 ms 2432 KB Output is correct
12 Correct 621 ms 2300 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1412 ms 6020 KB Output is correct
2 Correct 31 ms 848 KB Output is correct
3 Correct 163 ms 4372 KB Output is correct
4 Correct 200 ms 4272 KB Output is correct
5 Correct 1637 ms 5916 KB Output is correct
6 Correct 1447 ms 5812 KB Output is correct
7 Correct 1653 ms 6108 KB Output is correct
8 Correct 674 ms 3756 KB Output is correct
9 Correct 689 ms 3588 KB Output is correct
10 Correct 698 ms 3772 KB Output is correct
11 Correct 1046 ms 4848 KB Output is correct
12 Correct 1039 ms 5056 KB Output is correct
13 Correct 1064 ms 5148 KB Output is correct
14 Correct 1594 ms 6108 KB Output is correct
15 Correct 1614 ms 6016 KB Output is correct
16 Correct 1370 ms 5824 KB Output is correct
17 Correct 1420 ms 5804 KB Output is correct
18 Correct 1396 ms 5648 KB Output is correct
19 Correct 1400 ms 5600 KB Output is correct
20 Correct 1222 ms 5412 KB Output is correct
21 Correct 1167 ms 5424 KB Output is correct
22 Correct 1351 ms 6096 KB Output is correct
23 Correct 1323 ms 5408 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1270 ms 3432 KB Output is correct
2 Correct 1323 ms 3548 KB Output is correct
3 Correct 1291 ms 3536 KB Output is correct
4 Correct 1367 ms 3612 KB Output is correct
5 Correct 1371 ms 3624 KB Output is correct
6 Correct 2059 ms 3748 KB Output is correct
7 Correct 1983 ms 3688 KB Output is correct
8 Correct 2007 ms 3660 KB Output is correct
9 Correct 33 ms 832 KB Output is correct
10 Correct 1470 ms 3524 KB Output is correct
11 Correct 1425 ms 3528 KB Output is correct
12 Correct 1166 ms 4120 KB Output is correct
13 Correct 1164 ms 3420 KB Output is correct
14 Correct 1051 ms 2460 KB Output is correct
15 Correct 833 ms 1248 KB Output is correct
16 Correct 1239 ms 2764 KB Output is correct
17 Correct 1008 ms 2536 KB Output is correct
18 Correct 31 ms 844 KB Output is correct
19 Correct 1176 ms 2420 KB Output is correct
20 Correct 967 ms 2544 KB Output is correct
21 Correct 859 ms 2552 KB Output is correct
22 Correct 666 ms 2564 KB Output is correct
23 Correct 622 ms 2720 KB Output is correct
24 Correct 685 ms 2432 KB Output is correct
25 Correct 621 ms 2300 KB Output is correct
26 Correct 1319 ms 3628 KB Output is correct
27 Correct 1635 ms 3596 KB Output is correct
28 Correct 1342 ms 3540 KB Output is correct
29 Correct 1006 ms 3504 KB Output is correct
30 Correct 1552 ms 3612 KB Output is correct
31 Correct 1580 ms 3632 KB Output is correct
32 Correct 1625 ms 3544 KB Output is correct
33 Correct 1331 ms 3696 KB Output is correct
34 Correct 1327 ms 3592 KB Output is correct
35 Correct 1350 ms 3604 KB Output is correct
36 Correct 1047 ms 3508 KB Output is correct
37 Correct 1034 ms 3360 KB Output is correct
38 Correct 1033 ms 3752 KB Output is correct
39 Correct 801 ms 3816 KB Output is correct
40 Correct 833 ms 3604 KB Output is correct
41 Correct 797 ms 3772 KB Output is correct
42 Correct 813 ms 3388 KB Output is correct
43 Correct 797 ms 3472 KB Output is correct
44 Correct 784 ms 3472 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 32 ms 408 KB Output is correct
4 Correct 4 ms 392 KB Output is correct
5 Correct 23 ms 404 KB Output is correct
6 Correct 23 ms 404 KB Output is correct
7 Correct 24 ms 392 KB Output is correct
8 Correct 23 ms 340 KB Output is correct
9 Correct 27 ms 384 KB Output is correct
10 Correct 23 ms 408 KB Output is correct
11 Correct 23 ms 420 KB Output is correct
12 Correct 24 ms 412 KB Output is correct
13 Correct 29 ms 416 KB Output is correct
14 Correct 28 ms 412 KB Output is correct
15 Correct 25 ms 424 KB Output is correct
16 Correct 25 ms 340 KB Output is correct
17 Correct 26 ms 408 KB Output is correct
18 Correct 1270 ms 3432 KB Output is correct
19 Correct 1323 ms 3548 KB Output is correct
20 Correct 1291 ms 3536 KB Output is correct
21 Correct 1367 ms 3612 KB Output is correct
22 Correct 1371 ms 3624 KB Output is correct
23 Correct 2059 ms 3748 KB Output is correct
24 Correct 1983 ms 3688 KB Output is correct
25 Correct 2007 ms 3660 KB Output is correct
26 Correct 33 ms 832 KB Output is correct
27 Correct 1470 ms 3524 KB Output is correct
28 Correct 1425 ms 3528 KB Output is correct
29 Correct 1166 ms 4120 KB Output is correct
30 Correct 1164 ms 3420 KB Output is correct
31 Correct 1051 ms 2460 KB Output is correct
32 Correct 833 ms 1248 KB Output is correct
33 Correct 1239 ms 2764 KB Output is correct
34 Correct 1008 ms 2536 KB Output is correct
35 Correct 31 ms 844 KB Output is correct
36 Correct 1176 ms 2420 KB Output is correct
37 Correct 967 ms 2544 KB Output is correct
38 Correct 859 ms 2552 KB Output is correct
39 Correct 666 ms 2564 KB Output is correct
40 Correct 622 ms 2720 KB Output is correct
41 Correct 685 ms 2432 KB Output is correct
42 Correct 621 ms 2300 KB Output is correct
43 Correct 1412 ms 6020 KB Output is correct
44 Correct 31 ms 848 KB Output is correct
45 Correct 163 ms 4372 KB Output is correct
46 Correct 200 ms 4272 KB Output is correct
47 Correct 1637 ms 5916 KB Output is correct
48 Correct 1447 ms 5812 KB Output is correct
49 Correct 1653 ms 6108 KB Output is correct
50 Correct 674 ms 3756 KB Output is correct
51 Correct 689 ms 3588 KB Output is correct
52 Correct 698 ms 3772 KB Output is correct
53 Correct 1046 ms 4848 KB Output is correct
54 Correct 1039 ms 5056 KB Output is correct
55 Correct 1064 ms 5148 KB Output is correct
56 Correct 1594 ms 6108 KB Output is correct
57 Correct 1614 ms 6016 KB Output is correct
58 Correct 1370 ms 5824 KB Output is correct
59 Correct 1420 ms 5804 KB Output is correct
60 Correct 1396 ms 5648 KB Output is correct
61 Correct 1400 ms 5600 KB Output is correct
62 Correct 1222 ms 5412 KB Output is correct
63 Correct 1167 ms 5424 KB Output is correct
64 Correct 1351 ms 6096 KB Output is correct
65 Correct 1323 ms 5408 KB Output is correct
66 Correct 1319 ms 3628 KB Output is correct
67 Correct 1635 ms 3596 KB Output is correct
68 Correct 1342 ms 3540 KB Output is correct
69 Correct 1006 ms 3504 KB Output is correct
70 Correct 1552 ms 3612 KB Output is correct
71 Correct 1580 ms 3632 KB Output is correct
72 Correct 1625 ms 3544 KB Output is correct
73 Correct 1331 ms 3696 KB Output is correct
74 Correct 1327 ms 3592 KB Output is correct
75 Correct 1350 ms 3604 KB Output is correct
76 Correct 1047 ms 3508 KB Output is correct
77 Correct 1034 ms 3360 KB Output is correct
78 Correct 1033 ms 3752 KB Output is correct
79 Correct 801 ms 3816 KB Output is correct
80 Correct 833 ms 3604 KB Output is correct
81 Correct 797 ms 3772 KB Output is correct
82 Correct 813 ms 3388 KB Output is correct
83 Correct 797 ms 3472 KB Output is correct
84 Correct 784 ms 3472 KB Output is correct
85 Correct 1873 ms 9908 KB Output is correct
86 Correct 189 ms 6316 KB Output is correct
87 Correct 199 ms 6444 KB Output is correct
88 Correct 2088 ms 8340 KB Output is correct
89 Correct 1881 ms 9896 KB Output is correct
90 Correct 2060 ms 8492 KB Output is correct
91 Correct 1379 ms 6152 KB Output is correct
92 Correct 1376 ms 6248 KB Output is correct
93 Correct 2017 ms 6280 KB Output is correct
94 Correct 1618 ms 8516 KB Output is correct
95 Correct 1577 ms 8484 KB Output is correct
96 Correct 1881 ms 8496 KB Output is correct
97 Correct 1749 ms 8248 KB Output is correct
98 Correct 1799 ms 8368 KB Output is correct
99 Correct 1849 ms 9620 KB Output is correct
100 Correct 1841 ms 9736 KB Output is correct
101 Correct 1902 ms 9632 KB Output is correct
102 Correct 1875 ms 9872 KB Output is correct
103 Correct 2001 ms 8572 KB Output is correct
104 Correct 1994 ms 8580 KB Output is correct
105 Correct 1471 ms 8568 KB Output is correct
106 Correct 1186 ms 8280 KB Output is correct
107 Correct 1370 ms 8864 KB Output is correct
108 Correct 1858 ms 9576 KB Output is correct
109 Correct 1846 ms 7672 KB Output is correct