oj.uz

Submission #318754

# Submission time Handle Problem Language Result Execution time Memory
318754 2020-11-03T06:36:11 Z BeanZ Bridges (APIO19_bridges) C++14
100 / 100
 2618 ms 131676 KB 
// I_Love_LPL
#include <bits/stdc++.h>
using namespace std;
#define ll int
#define endl '\n'
const int N = 1e5 + 5;
vector<pair<ll, ll>> rb;
vector<ll> join[N];
ll u[N], v[N], d[N], t[N], a[N], b[N], ch[N], p[N], ans[N];
void rollback(ll u){
    while (rb.size() > u){
        p[rb.back().first] = rb.back().second;
        rb.pop_back();
    }
}
ll find_set(ll u){
    if (p[u] < 0) return u;
    return find_set(p[u]);
}
void dsu(ll u, ll v){
    u = find_set(u);
    v = find_set(v);
    if (u == v) return;
    if (p[u] > p[v]) swap(u, v);
    rb.push_back({u, p[u]});
    rb.push_back({v, p[v]});
    p[u] += p[v];
    p[v] = u;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    if (fopen("A.inp", "r")){
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    ll n, m;
    cin >> n >> m;
    for (int i = 1; i <= m; i++){
        cin >> u[i] >> v[i] >> d[i];
    }
    ll q;
    cin >> q;
    for (int i = 1; i <= q; i++){
        cin >> t[i] >> a[i] >> b[i];
    }
    const int base = 1000;
    for (int l = 1; l <= q; l += base){
        for (int i = 1; i <= n; i++) p[i] = -1;
        ll r = min(l + base - 1, q);
        for (int i = 1; i <= m; i++) ch[i] = 0;
        rb.clear();
        vector<ll> memupd, memres, un;
        for (int i = l; i <= r; i++){
            if (t[i] == 1) memupd.push_back(a[i]);
        }
        for (int i = l; i <= r; i++){
            if (t[i] == 1){
                d[a[i]] = b[i];
                ch[a[i]] = 1;
            } else {
                for (auto j : memupd){
                    if (d[j] >= b[i]){
                        join[i].push_back(j);
                    }
                }
                memres.push_back(i);
            }
        }
        for (int i = 1; i <= m; i++){
            if (ch[i] == 0) un.push_back(i);
        }
        sort(un.begin(), un.end(), [&](ll g, ll h){return d[g] > d[h];});
        sort(memres.begin(), memres.end(), [&](ll g, ll h){return b[g] > b[h];});
        ll now = 0;
        //for (auto j : memres) cout << j << " ";
        //cout << endl;
        for (auto j : memres){
            while (now < un.size() && d[un[now]] >= b[j]){
                dsu(u[un[now]], v[un[now]]);
                //cout << u[un[now]] << " " << v[un[now]] << " " << now << " " << a[j] << " " << j << endl;
                now++;
            }
            ll tmp = rb.size();
            for (auto o : join[j]){
                dsu(u[o], v[o]);
            }
            //cout << b[j] << endl;
            //cout << j << endl;
            ans[j] = -p[find_set(a[j])];
            //cout << j << " " << ans[j] << endl;
            rollback(tmp);
        }
    }
    for (int i = 1; i <= q; i++){
        if (t[i] == 2) cout << ans[i] << endl;
    }
}
/*
3 4
1 2 5
2 3 2
3 1 4
2 3 8
1
2 1 5
*/

Compilation message

bridges.cpp: In function 'void rollback(int)':
bridges.cpp:11:22: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   11 |     while (rb.size() > u){
      |            ~~~~~~~~~~^~~
bridges.cpp: In function 'int main()':
bridges.cpp:79:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |             while (now < un.size() && d[un[now]] >= b[j]){
      |                    ~~~~^~~~~~~~~~~
bridges.cpp:34:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   34 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:35:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   35 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2668 KB Output is correct
2 Correct 2 ms 2668 KB Output is correct
3 Correct 47 ms 9572 KB Output is correct
4 Correct 6 ms 2924 KB Output is correct
5 Correct 50 ms 10340 KB Output is correct
6 Correct 40 ms 10468 KB Output is correct
7 Correct 48 ms 10596 KB Output is correct
8 Correct 48 ms 8932 KB Output is correct
9 Correct 71 ms 14820 KB Output is correct
10 Correct 51 ms 9700 KB Output is correct
11 Correct 50 ms 9720 KB Output is correct
12 Correct 62 ms 12004 KB Output is correct
13 Correct 58 ms 10212 KB Output is correct
14 Correct 53 ms 9316 KB Output is correct
15 Correct 58 ms 10084 KB Output is correct
16 Correct 61 ms 13028 KB Output is correct
17 Correct 62 ms 12136 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1476 ms 73872 KB Output is correct
2 Correct 1498 ms 73748 KB Output is correct
3 Correct 1506 ms 74028 KB Output is correct
4 Correct 1561 ms 73432 KB Output is correct
5 Correct 1545 ms 73960 KB Output is correct
6 Correct 2330 ms 131676 KB Output is correct
7 Correct 2318 ms 128228 KB Output is correct
8 Correct 2356 ms 128004 KB Output is correct
9 Correct 42 ms 4452 KB Output is correct
10 Correct 1401 ms 99808 KB Output is correct
11 Correct 1292 ms 99232 KB Output is correct
12 Correct 1302 ms 53608 KB Output is correct
13 Correct 1308 ms 46744 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1193 ms 73432 KB Output is correct
2 Correct 1055 ms 98024 KB Output is correct
3 Correct 1509 ms 101212 KB Output is correct
4 Correct 1197 ms 72668 KB Output is correct
5 Correct 42 ms 4452 KB Output is correct
6 Correct 1393 ms 92640 KB Output is correct
7 Correct 1111 ms 64860 KB Output is correct
8 Correct 946 ms 49004 KB Output is correct
9 Correct 826 ms 40840 KB Output is correct
10 Correct 717 ms 29356 KB Output is correct
11 Correct 809 ms 38296 KB Output is correct
12 Correct 696 ms 28244 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1726 ms 8196 KB Output is correct
2 Correct 46 ms 5988 KB Output is correct
3 Correct 176 ms 7240 KB Output is correct
4 Correct 89 ms 7376 KB Output is correct
5 Correct 899 ms 10196 KB Output is correct
6 Correct 1679 ms 10096 KB Output is correct
7 Correct 887 ms 10124 KB Output is correct
8 Correct 776 ms 9104 KB Output is correct
9 Correct 768 ms 8984 KB Output is correct
10 Correct 772 ms 8984 KB Output is correct
11 Correct 1259 ms 9584 KB Output is correct
12 Correct 1241 ms 9472 KB Output is correct
13 Correct 1288 ms 9516 KB Output is correct
14 Correct 783 ms 9816 KB Output is correct
15 Correct 847 ms 9860 KB Output is correct
16 Correct 1704 ms 10172 KB Output is correct
17 Correct 1712 ms 10228 KB Output is correct
18 Correct 1692 ms 10216 KB Output is correct
19 Correct 1704 ms 10408 KB Output is correct
20 Correct 1446 ms 10648 KB Output is correct
21 Correct 1431 ms 10868 KB Output is correct
22 Correct 1663 ms 11452 KB Output is correct
23 Correct 964 ms 9536 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1476 ms 73872 KB Output is correct
2 Correct 1498 ms 73748 KB Output is correct
3 Correct 1506 ms 74028 KB Output is correct
4 Correct 1561 ms 73432 KB Output is correct
5 Correct 1545 ms 73960 KB Output is correct
6 Correct 2330 ms 131676 KB Output is correct
7 Correct 2318 ms 128228 KB Output is correct
8 Correct 2356 ms 128004 KB Output is correct
9 Correct 42 ms 4452 KB Output is correct
10 Correct 1401 ms 99808 KB Output is correct
11 Correct 1292 ms 99232 KB Output is correct
12 Correct 1302 ms 53608 KB Output is correct
13 Correct 1308 ms 46744 KB Output is correct
14 Correct 1193 ms 73432 KB Output is correct
15 Correct 1055 ms 98024 KB Output is correct
16 Correct 1509 ms 101212 KB Output is correct
17 Correct 1197 ms 72668 KB Output is correct
18 Correct 42 ms 4452 KB Output is correct
19 Correct 1393 ms 92640 KB Output is correct
20 Correct 1111 ms 64860 KB Output is correct
21 Correct 946 ms 49004 KB Output is correct
22 Correct 826 ms 40840 KB Output is correct
23 Correct 717 ms 29356 KB Output is correct
24 Correct 809 ms 38296 KB Output is correct
25 Correct 696 ms 28244 KB Output is correct
26 Correct 1490 ms 73956 KB Output is correct
27 Correct 1931 ms 103108 KB Output is correct
28 Correct 1564 ms 72004 KB Output is correct
29 Correct 1082 ms 29072 KB Output is correct
30 Correct 1794 ms 89512 KB Output is correct
31 Correct 1822 ms 91924 KB Output is correct
32 Correct 1838 ms 92436 KB Output is correct
33 Correct 1523 ms 72196 KB Output is correct
34 Correct 1523 ms 72380 KB Output is correct
35 Correct 1530 ms 72720 KB Output is correct
36 Correct 1136 ms 35988 KB Output is correct
37 Correct 1125 ms 34836 KB Output is correct
38 Correct 1096 ms 33168 KB Output is correct
39 Correct 910 ms 19344 KB Output is correct
40 Correct 910 ms 18396 KB Output is correct
41 Correct 897 ms 17792 KB Output is correct
42 Correct 878 ms 17692 KB Output is correct
43 Correct 877 ms 16880 KB Output is correct
44 Correct 871 ms 16332 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2668 KB Output is correct
2 Correct 2 ms 2668 KB Output is correct
3 Correct 47 ms 9572 KB Output is correct
4 Correct 6 ms 2924 KB Output is correct
5 Correct 50 ms 10340 KB Output is correct
6 Correct 40 ms 10468 KB Output is correct
7 Correct 48 ms 10596 KB Output is correct
8 Correct 48 ms 8932 KB Output is correct
9 Correct 71 ms 14820 KB Output is correct
10 Correct 51 ms 9700 KB Output is correct
11 Correct 50 ms 9720 KB Output is correct
12 Correct 62 ms 12004 KB Output is correct
13 Correct 58 ms 10212 KB Output is correct
14 Correct 53 ms 9316 KB Output is correct
15 Correct 58 ms 10084 KB Output is correct
16 Correct 61 ms 13028 KB Output is correct
17 Correct 62 ms 12136 KB Output is correct
18 Correct 1476 ms 73872 KB Output is correct
19 Correct 1498 ms 73748 KB Output is correct
20 Correct 1506 ms 74028 KB Output is correct
21 Correct 1561 ms 73432 KB Output is correct
22 Correct 1545 ms 73960 KB Output is correct
23 Correct 2330 ms 131676 KB Output is correct
24 Correct 2318 ms 128228 KB Output is correct
25 Correct 2356 ms 128004 KB Output is correct
26 Correct 42 ms 4452 KB Output is correct
27 Correct 1401 ms 99808 KB Output is correct
28 Correct 1292 ms 99232 KB Output is correct
29 Correct 1302 ms 53608 KB Output is correct
30 Correct 1308 ms 46744 KB Output is correct
31 Correct 1193 ms 73432 KB Output is correct
32 Correct 1055 ms 98024 KB Output is correct
33 Correct 1509 ms 101212 KB Output is correct
34 Correct 1197 ms 72668 KB Output is correct
35 Correct 42 ms 4452 KB Output is correct
36 Correct 1393 ms 92640 KB Output is correct
37 Correct 1111 ms 64860 KB Output is correct
38 Correct 946 ms 49004 KB Output is correct
39 Correct 826 ms 40840 KB Output is correct
40 Correct 717 ms 29356 KB Output is correct
41 Correct 809 ms 38296 KB Output is correct
42 Correct 696 ms 28244 KB Output is correct
43 Correct 1726 ms 8196 KB Output is correct
44 Correct 46 ms 5988 KB Output is correct
45 Correct 176 ms 7240 KB Output is correct
46 Correct 89 ms 7376 KB Output is correct
47 Correct 899 ms 10196 KB Output is correct
48 Correct 1679 ms 10096 KB Output is correct
49 Correct 887 ms 10124 KB Output is correct
50 Correct 776 ms 9104 KB Output is correct
51 Correct 768 ms 8984 KB Output is correct
52 Correct 772 ms 8984 KB Output is correct
53 Correct 1259 ms 9584 KB Output is correct
54 Correct 1241 ms 9472 KB Output is correct
55 Correct 1288 ms 9516 KB Output is correct
56 Correct 783 ms 9816 KB Output is correct
57 Correct 847 ms 9860 KB Output is correct
58 Correct 1704 ms 10172 KB Output is correct
59 Correct 1712 ms 10228 KB Output is correct
60 Correct 1692 ms 10216 KB Output is correct
61 Correct 1704 ms 10408 KB Output is correct
62 Correct 1446 ms 10648 KB Output is correct
63 Correct 1431 ms 10868 KB Output is correct
64 Correct 1663 ms 11452 KB Output is correct
65 Correct 964 ms 9536 KB Output is correct
66 Correct 1490 ms 73956 KB Output is correct
67 Correct 1931 ms 103108 KB Output is correct
68 Correct 1564 ms 72004 KB Output is correct
69 Correct 1082 ms 29072 KB Output is correct
70 Correct 1794 ms 89512 KB Output is correct
71 Correct 1822 ms 91924 KB Output is correct
72 Correct 1838 ms 92436 KB Output is correct
73 Correct 1523 ms 72196 KB Output is correct
74 Correct 1523 ms 72380 KB Output is correct
75 Correct 1530 ms 72720 KB Output is correct
76 Correct 1136 ms 35988 KB Output is correct
77 Correct 1125 ms 34836 KB Output is correct
78 Correct 1096 ms 33168 KB Output is correct
79 Correct 910 ms 19344 KB Output is correct
80 Correct 910 ms 18396 KB Output is correct
81 Correct 897 ms 17792 KB Output is correct
82 Correct 878 ms 17692 KB Output is correct
83 Correct 877 ms 16880 KB Output is correct
84 Correct 871 ms 16332 KB Output is correct
85 Correct 2317 ms 78848 KB Output is correct
86 Correct 223 ms 13980 KB Output is correct
87 Correct 151 ms 18336 KB Output is correct
88 Correct 1482 ms 90628 KB Output is correct
89 Correct 2324 ms 77352 KB Output is correct
90 Correct 1492 ms 99520 KB Output is correct
91 Correct 1573 ms 76444 KB Output is correct
92 Correct 1576 ms 76256 KB Output is correct
93 Correct 2344 ms 114196 KB Output is correct
94 Correct 1945 ms 77792 KB Output is correct
95 Correct 1933 ms 77492 KB Output is correct
96 Correct 2389 ms 118160 KB Output is correct
97 Correct 1122 ms 43340 KB Output is correct
98 Correct 1145 ms 40416 KB Output is correct
99 Correct 2342 ms 79980 KB Output is correct
100 Correct 2333 ms 78740 KB Output is correct
101 Correct 2404 ms 78568 KB Output is correct
102 Correct 2343 ms 78740 KB Output is correct
103 Correct 2618 ms 123932 KB Output is correct
104 Correct 2608 ms 123376 KB Output is correct
105 Correct 1863 ms 51292 KB Output is correct
106 Correct 1471 ms 30976 KB Output is correct
107 Correct 1804 ms 57532 KB Output is correct
108 Correct 2444 ms 114060 KB Output is correct
109 Correct 1830 ms 117352 KB Output is correct