oj.uz

Submission #320079

# Submission time Handle Problem Language Result Execution time Memory
320079 2020-11-07T13:24:35 Z kostia244 Bridges (APIO19_bridges) C++17
100 / 100
 2835 ms 11956 KB 
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx,avx2,sse,sse2,ssse3,sse4,sse4.1")
#include<bits/stdc++.h>
#define all(x) begin(x), end(x)
using namespace std;
const int maxn = 1<<17;
int n, m, q, u[maxn], v[maxn], w[maxn], t[maxn], x[maxn], y[maxn], ans[maxn], bkup[maxn];
vector<int> eord;
struct dsu {
	int p[maxn], r[maxn], sz[maxn];
	void init() { fill(all(p), -1), fill(all(r), 1); fill(all(sz), 0);}
	int par(int v) { return p[v]!=-1 ? p[v] = par(p[v]) : v; }
	void unite(int i, int j) {
		i = par(i), j = par(j);
		if(i == j) return;
		if(r[i] > r[j]) swap(i, j);
		p[j] = i, r[i] += r[j], sz[i] += sz[j];
	}
};
int used[maxn];
dsu d, g;
void solve(int L, int R) {
	for(int i = 0; i < m; i++) bkup[i] = w[i];
	d.init();
	fill(all(used), 0);
	vector<int> qs;
	for(int i = L; i < R; i++)
		if(t[i] == 1) used[x[i]] = maxn;
		else qs.push_back(i);
	sort(all(qs), [&](auto i, auto j) {  return y[i] < y[j]; });
	vector<int> A, B, C;
	A.reserve(m);
	B.reserve(R-L+1);
	C.reserve(m);
	for(auto &i : eord) (used[i] ? B : A).push_back(i);
	int J = 0;
	for(auto id : qs) {
		int s = x[id], mw = y[id];
		for(int j;J < A.size() && (j = A[J], w[j] <= mw); J++) {
			d.unite(u[j], v[j]);
		}
		for(auto i : B) w[i] = bkup[i];
		for(int i = L; i < id; i++) if(t[i]^2) w[x[i]] = y[i];
		for(auto i : B) {
			int X = d.par(u[i]), Y = d.par(v[i]);
			g.r[X] = g.r[Y] = 1;
			g.p[X] = g.p[Y] = -1;
			g.sz[X] = d.r[X];
			g.sz[Y] = d.r[Y];
		}
		s = d.par(s);
		g.r[s] = 1, g.p[s] = -1, g.sz[s] = d.r[s];
		for(auto i : B) {
			if(w[i] <= mw) g.unite(d.par(u[i]), d.par(v[i]));
		}
		ans[id] = g.sz[g.par(d.par(s))];
	}
	for(int i = L; i < R; i++)
		if(t[i]^2) w[x[i]] = y[i];
	auto cmp = [&](auto i, auto j) { return w[i] < w[j]; };
	sort(all(B), cmp);
	merge(all(A), all(B), back_inserter(C), cmp);
	eord = C;
}
int main() {
	cin.tie(0)->sync_with_stdio(0);
	fill(all(ans), 0);
	cin >> n >> m;
	for(int i = 0; i < m; i++) cin >> u[i] >> v[i] >> w[i], u[i]--, v[i]--, w[i] *= -1;
	for(int i = (cin>>q, 0); i < q; i++) cin >> t[i] >> x[i] >> y[i], x[i]--, y[i] *= -1;
	eord.resize(m), iota(all(eord), 0);
	sort(all(eord), [&](auto i, auto j) { return w[i] < w[j]; });
	for(int i = 0, B = 700; i < q; i += B) solve(i, min(q, i+B));
	for(int i = 0; i < q; i++) if(ans[i] > 0) cout << ans[i] << '\n';
}

Compilation message

bridges.cpp: In function 'void solve(int, int)':
bridges.cpp:39:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |   for(int j;J < A.size() && (j = A[J], w[j] <= mw); J++) {
      |             ~~^~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2924 KB Output is correct
2 Correct 2 ms 3052 KB Output is correct
3 Correct 47 ms 3288 KB Output is correct
4 Correct 10 ms 3052 KB Output is correct
5 Correct 22 ms 3052 KB Output is correct
6 Correct 20 ms 3052 KB Output is correct
7 Correct 22 ms 3052 KB Output is correct
8 Correct 23 ms 3052 KB Output is correct
9 Correct 25 ms 3180 KB Output is correct
10 Correct 23 ms 3052 KB Output is correct
11 Correct 23 ms 3052 KB Output is correct
12 Correct 24 ms 3052 KB Output is correct
13 Correct 30 ms 3052 KB Output is correct
14 Correct 29 ms 3172 KB Output is correct
15 Correct 26 ms 3052 KB Output is correct
16 Correct 24 ms 3052 KB Output is correct
17 Correct 24 ms 3180 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1375 ms 6232 KB Output is correct
2 Correct 1342 ms 6276 KB Output is correct
3 Correct 1351 ms 6476 KB Output is correct
4 Correct 1346 ms 6424 KB Output is correct
5 Correct 1389 ms 6272 KB Output is correct
6 Correct 1711 ms 6732 KB Output is correct
7 Correct 1706 ms 6448 KB Output is correct
8 Correct 1702 ms 6484 KB Output is correct
9 Correct 88 ms 4452 KB Output is correct
10 Correct 1379 ms 6432 KB Output is correct
11 Correct 1348 ms 6520 KB Output is correct
12 Correct 955 ms 6700 KB Output is correct
13 Correct 1016 ms 6544 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1400 ms 5704 KB Output is correct
2 Correct 1215 ms 4836 KB Output is correct
3 Correct 1778 ms 5740 KB Output is correct
4 Correct 1565 ms 5744 KB Output is correct
5 Correct 88 ms 4580 KB Output is correct
6 Correct 1706 ms 5740 KB Output is correct
7 Correct 1477 ms 5752 KB Output is correct
8 Correct 1344 ms 5724 KB Output is correct
9 Correct 919 ms 5808 KB Output is correct
10 Correct 833 ms 5784 KB Output is correct
11 Correct 972 ms 5744 KB Output is correct
12 Correct 886 ms 5608 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1672 ms 7668 KB Output is correct
2 Correct 87 ms 4764 KB Output is correct
3 Correct 120 ms 6640 KB Output is correct
4 Correct 81 ms 6408 KB Output is correct
5 Correct 1383 ms 8300 KB Output is correct
6 Correct 1671 ms 8164 KB Output is correct
7 Correct 1362 ms 8136 KB Output is correct
8 Correct 614 ms 6740 KB Output is correct
9 Correct 608 ms 6748 KB Output is correct
10 Correct 604 ms 6732 KB Output is correct
11 Correct 1050 ms 7608 KB Output is correct
12 Correct 1027 ms 7464 KB Output is correct
13 Correct 1054 ms 7528 KB Output is correct
14 Correct 1283 ms 8268 KB Output is correct
15 Correct 1298 ms 8248 KB Output is correct
16 Correct 1597 ms 8004 KB Output is correct
17 Correct 1575 ms 8376 KB Output is correct
18 Correct 1504 ms 8156 KB Output is correct
19 Correct 1505 ms 8152 KB Output is correct
20 Correct 1178 ms 7776 KB Output is correct
21 Correct 1203 ms 7704 KB Output is correct
22 Correct 1541 ms 8156 KB Output is correct
23 Correct 1199 ms 7580 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1375 ms 6232 KB Output is correct
2 Correct 1342 ms 6276 KB Output is correct
3 Correct 1351 ms 6476 KB Output is correct
4 Correct 1346 ms 6424 KB Output is correct
5 Correct 1389 ms 6272 KB Output is correct
6 Correct 1711 ms 6732 KB Output is correct
7 Correct 1706 ms 6448 KB Output is correct
8 Correct 1702 ms 6484 KB Output is correct
9 Correct 88 ms 4452 KB Output is correct
10 Correct 1379 ms 6432 KB Output is correct
11 Correct 1348 ms 6520 KB Output is correct
12 Correct 955 ms 6700 KB Output is correct
13 Correct 1016 ms 6544 KB Output is correct
14 Correct 1400 ms 5704 KB Output is correct
15 Correct 1215 ms 4836 KB Output is correct
16 Correct 1778 ms 5740 KB Output is correct
17 Correct 1565 ms 5744 KB Output is correct
18 Correct 88 ms 4580 KB Output is correct
19 Correct 1706 ms 5740 KB Output is correct
20 Correct 1477 ms 5752 KB Output is correct
21 Correct 1344 ms 5724 KB Output is correct
22 Correct 919 ms 5808 KB Output is correct
23 Correct 833 ms 5784 KB Output is correct
24 Correct 972 ms 5744 KB Output is correct
25 Correct 886 ms 5608 KB Output is correct
26 Correct 1822 ms 6460 KB Output is correct
27 Correct 2156 ms 6676 KB Output is correct
28 Correct 1924 ms 6412 KB Output is correct
29 Correct 1545 ms 6580 KB Output is correct
30 Correct 1771 ms 6452 KB Output is correct
31 Correct 1856 ms 6488 KB Output is correct
32 Correct 1876 ms 6684 KB Output is correct
33 Correct 1598 ms 6536 KB Output is correct
34 Correct 1645 ms 6496 KB Output is correct
35 Correct 1689 ms 6560 KB Output is correct
36 Correct 1360 ms 6276 KB Output is correct
37 Correct 1395 ms 6380 KB Output is correct
38 Correct 1396 ms 6276 KB Output is correct
39 Correct 921 ms 6436 KB Output is correct
40 Correct 927 ms 6412 KB Output is correct
41 Correct 972 ms 6376 KB Output is correct
42 Correct 906 ms 6300 KB Output is correct
43 Correct 955 ms 6328 KB Output is correct
44 Correct 938 ms 6536 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2924 KB Output is correct
2 Correct 2 ms 3052 KB Output is correct
3 Correct 47 ms 3288 KB Output is correct
4 Correct 10 ms 3052 KB Output is correct
5 Correct 22 ms 3052 KB Output is correct
6 Correct 20 ms 3052 KB Output is correct
7 Correct 22 ms 3052 KB Output is correct
8 Correct 23 ms 3052 KB Output is correct
9 Correct 25 ms 3180 KB Output is correct
10 Correct 23 ms 3052 KB Output is correct
11 Correct 23 ms 3052 KB Output is correct
12 Correct 24 ms 3052 KB Output is correct
13 Correct 30 ms 3052 KB Output is correct
14 Correct 29 ms 3172 KB Output is correct
15 Correct 26 ms 3052 KB Output is correct
16 Correct 24 ms 3052 KB Output is correct
17 Correct 24 ms 3180 KB Output is correct
18 Correct 1375 ms 6232 KB Output is correct
19 Correct 1342 ms 6276 KB Output is correct
20 Correct 1351 ms 6476 KB Output is correct
21 Correct 1346 ms 6424 KB Output is correct
22 Correct 1389 ms 6272 KB Output is correct
23 Correct 1711 ms 6732 KB Output is correct
24 Correct 1706 ms 6448 KB Output is correct
25 Correct 1702 ms 6484 KB Output is correct
26 Correct 88 ms 4452 KB Output is correct
27 Correct 1379 ms 6432 KB Output is correct
28 Correct 1348 ms 6520 KB Output is correct
29 Correct 955 ms 6700 KB Output is correct
30 Correct 1016 ms 6544 KB Output is correct
31 Correct 1400 ms 5704 KB Output is correct
32 Correct 1215 ms 4836 KB Output is correct
33 Correct 1778 ms 5740 KB Output is correct
34 Correct 1565 ms 5744 KB Output is correct
35 Correct 88 ms 4580 KB Output is correct
36 Correct 1706 ms 5740 KB Output is correct
37 Correct 1477 ms 5752 KB Output is correct
38 Correct 1344 ms 5724 KB Output is correct
39 Correct 919 ms 5808 KB Output is correct
40 Correct 833 ms 5784 KB Output is correct
41 Correct 972 ms 5744 KB Output is correct
42 Correct 886 ms 5608 KB Output is correct
43 Correct 1672 ms 7668 KB Output is correct
44 Correct 87 ms 4764 KB Output is correct
45 Correct 120 ms 6640 KB Output is correct
46 Correct 81 ms 6408 KB Output is correct
47 Correct 1383 ms 8300 KB Output is correct
48 Correct 1671 ms 8164 KB Output is correct
49 Correct 1362 ms 8136 KB Output is correct
50 Correct 614 ms 6740 KB Output is correct
51 Correct 608 ms 6748 KB Output is correct
52 Correct 604 ms 6732 KB Output is correct
53 Correct 1050 ms 7608 KB Output is correct
54 Correct 1027 ms 7464 KB Output is correct
55 Correct 1054 ms 7528 KB Output is correct
56 Correct 1283 ms 8268 KB Output is correct
57 Correct 1298 ms 8248 KB Output is correct
58 Correct 1597 ms 8004 KB Output is correct
59 Correct 1575 ms 8376 KB Output is correct
60 Correct 1504 ms 8156 KB Output is correct
61 Correct 1505 ms 8152 KB Output is correct
62 Correct 1178 ms 7776 KB Output is correct
63 Correct 1203 ms 7704 KB Output is correct
64 Correct 1541 ms 8156 KB Output is correct
65 Correct 1199 ms 7580 KB Output is correct
66 Correct 1822 ms 6460 KB Output is correct
67 Correct 2156 ms 6676 KB Output is correct
68 Correct 1924 ms 6412 KB Output is correct
69 Correct 1545 ms 6580 KB Output is correct
70 Correct 1771 ms 6452 KB Output is correct
71 Correct 1856 ms 6488 KB Output is correct
72 Correct 1876 ms 6684 KB Output is correct
73 Correct 1598 ms 6536 KB Output is correct
74 Correct 1645 ms 6496 KB Output is correct
75 Correct 1689 ms 6560 KB Output is correct
76 Correct 1360 ms 6276 KB Output is correct
77 Correct 1395 ms 6380 KB Output is correct
78 Correct 1396 ms 6276 KB Output is correct
79 Correct 921 ms 6436 KB Output is correct
80 Correct 927 ms 6412 KB Output is correct
81 Correct 972 ms 6376 KB Output is correct
82 Correct 906 ms 6300 KB Output is correct
83 Correct 955 ms 6328 KB Output is correct
84 Correct 938 ms 6536 KB Output is correct
85 Correct 2835 ms 8232 KB Output is correct
86 Correct 192 ms 7784 KB Output is correct
87 Correct 157 ms 7904 KB Output is correct
88 Correct 2339 ms 9996 KB Output is correct
89 Correct 2835 ms 11488 KB Output is correct
90 Correct 2319 ms 9828 KB Output is correct
91 Correct 1545 ms 8836 KB Output is correct
92 Correct 1542 ms 9288 KB Output is correct
93 Correct 1794 ms 8784 KB Output is correct
94 Correct 1944 ms 10012 KB Output is correct
95 Correct 2012 ms 10448 KB Output is correct
96 Correct 1982 ms 10140 KB Output is correct
97 Correct 1675 ms 10016 KB Output is correct
98 Correct 1788 ms 9824 KB Output is correct
99 Correct 2758 ms 11384 KB Output is correct
100 Correct 2637 ms 11344 KB Output is correct
101 Correct 2646 ms 11596 KB Output is correct
102 Correct 2629 ms 11956 KB Output is correct
103 Correct 2079 ms 10732 KB Output is correct
104 Correct 2077 ms 10832 KB Output is correct
105 Correct 1524 ms 10620 KB Output is correct
106 Correct 1214 ms 10364 KB Output is correct
107 Correct 1511 ms 10328 KB Output is correct
108 Correct 2587 ms 11144 KB Output is correct
109 Correct 2091 ms 9580 KB Output is correct