oj.uz

Submission #789298

# Submission time Handle Problem Language Result Execution time Memory
789298 2023-07-21T09:02:16 Z 박상훈(#10042) Tourism (JOI23_tourism) C++17
34 / 100
 5000 ms 16332 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
constexpr int B = 400, INF = 1e9 + 100;

vector<int> adj[100100];
int a[100100], ans[100100], cnt[100100], val;
multiset<pair<int, int>> st;

int in[100100], out[100100], dep[100100], cnti;

int on[100100], C[100100], par[100100], chk[100100];

struct Query{
	int s, e, i;
	Query(){}
	Query(int _s, int _e, int _i): s(_s), e(_e), i(_i) {}

	bool operator < (const Query &Q) const{
		if (s / B == Q.s / B){
			if ((s / B) % 2 == 0) return e < Q.e;
			return e > Q.e;
		} 
		return s / B < Q.s / B;
	}
}Q[100100];

struct Seg{
	pair<int, int> tree[400400];
	int sz;

	void init(int n){
		sz = n;
		// for (int i=sz;i<sz*2;i++) printf("(%d, %d) ", tree[i].first, tree[i].second);
		// printf("\n");
		for (int i=sz-1;i;i--) tree[i] = min(tree[i<<1], tree[i<<1|1]);
	}

	int query(int l, int r){
		// printf("  query %d to %d\n", l, r);
		++r;
		pair<int, int> ret = {INF, 0};
		for (l+=sz, r+=sz;l<r;l>>=1, r>>=1){
			if (l&1) ret = min(ret, tree[l++]);
			if (r&1) ret = min(ret, tree[--r]);
		}

		return ret.second;
	}
}rmq;

void dfs(int s, int pa = 0){
	in[s] = ++cnti;
	dep[s] = dep[pa] + 1;
	rmq.tree[cnti + rmq.sz] = {dep[s], s};

	par[s] = pa;
	
	for (auto &v:adj[s]) if (v!=pa){
		dfs(v, s);

		++cnti;
		rmq.tree[cnti + rmq.sz] = {dep[s], s};
	}

	// out[s] = ++cnti;
	// rmq.tree[cnti + rmq.sz] = {dep[s], s};
}

int dist(int x, int y){
	int lca = rmq.query(min(in[x], in[y]), max(in[x], in[y]));
	// printf(" calc %d %d -> %d (lca = %d)\n", x, y, dep[x] + dep[y] - dep[lca] * 2, lca);
	return dep[x] + dep[y] - dep[lca] * 2;
}

void push(int x){
	x = a[x];
	// printf("push %d\n", x);
	cnt[x]++;
	if (cnt[x]==1){
		chk[dep[x]]++;
		for (int s=x;s;s=par[s]){
			on[s]++;
			if (on[s]==1){
				C[dep[s]]++;
				val++;
			}
		}

		// auto iter = st.emplace(in[x], x);

		// auto prv = (iter==st.begin())?(prev(st.end())):(prev(iter));
		// auto nxt = (next(iter)==st.end())?(st.begin()):(next(iter));

		// val -= dist(prv->second, nxt->second);
		// val += dist(prv->second, iter->second);
		// val += dist(iter->second, nxt->second);
	}

	// printf(" ok val = %d\n", val);
}

void pop(int x){
	x = a[x];
	// printf("pop %d\n", x);
	cnt[x]--;
	if (cnt[x]==0){
		chk[dep[x]]--;
		for (int s=x;s;s=par[s]){
			on[s]--;
			if (on[s]==0){
				C[dep[s]]--;
				val--;
			}
		}

		// auto iter = st.find(pair<int, int>(in[x], x));
		// assert(iter!=st.end());

		// auto prv = (iter==st.begin())?(prev(st.end())):(prev(iter));
		// auto nxt = (next(iter)==st.end())?(st.begin()):(next(iter));

		// val += dist(prv->second, nxt->second);
		// val -= dist(prv->second, iter->second);
		// val -= dist(iter->second, nxt->second);

		// st.erase(iter);
	}

	// printf(" ok val = %d\n", val);
}

int ofs(){
	int ret = 0;
	for (int i=1;;i++){
		if (C[i]==1 && chk[i]==0) ret = i-1;
		else if (C[i]==1){
			ret = i-1;
			break;
		}
		else break;
	} 
	return ret;
}

int main(){
	int n, m, q;
	scanf("%d %d %d", &n, &m, &q);

	for (int i=1;i<=n-1;i++){
		int x, y;
		scanf("%d %d", &x, &y);
		adj[x].push_back(y);
		adj[y].push_back(x);
	}

	for (int i=1;i<=m;i++) scanf("%d", a+i);

	for (int i=1;i<=q;i++){
		scanf("%d %d", &Q[i].s, &Q[i].e);
		Q[i].i = i;
	}

	rmq.sz = n*2+10;
	dfs(1);
	rmq.init(n*2+10);

	sort(Q+1, Q+q+1);
	int l = 1, r = 0;
	for (int i=1;i<=q;i++){
		while(r<Q[i].e){
			++r;
			push(r);
		}

		while(l>Q[i].s){
			--l;
			push(l);
		}

		while(r>Q[i].e){
			pop(r);
			r--;
		}

		while(l<Q[i].s){
			pop(l);
			l++;
		}

		ans[Q[i].i] = val - ofs();
		// printf("ok %d to %d -> %d - %d\n", Q[i].s, Q[i].e, val, ofs());
	}

	for (int i=1;i<=q;i++) printf("%d\n", ans[i]);

}

Compilation message

tourism.cpp: In function 'int main()':
tourism.cpp:149:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  149 |  scanf("%d %d %d", &n, &m, &q);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
tourism.cpp:153:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  153 |   scanf("%d %d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~~
tourism.cpp:158:30: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  158 |  for (int i=1;i<=m;i++) scanf("%d", a+i);
      |                         ~~~~~^~~~~~~~~~~
tourism.cpp:161:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  161 |   scanf("%d %d", &Q[i].s, &Q[i].e);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 2 ms 5716 KB Output is correct
3 Correct 2 ms 5716 KB Output is correct
4 Correct 3 ms 5844 KB Output is correct
5 Correct 3 ms 5844 KB Output is correct
6 Correct 3 ms 5844 KB Output is correct
7 Correct 3 ms 5844 KB Output is correct
8 Correct 3 ms 5800 KB Output is correct
9 Correct 4 ms 5804 KB Output is correct
10 Correct 3 ms 5844 KB Output is correct
11 Correct 3 ms 5844 KB Output is correct
12 Correct 4 ms 5844 KB Output is correct
13 Correct 3 ms 5844 KB Output is correct
14 Correct 3 ms 5844 KB Output is correct
15 Correct 6 ms 5844 KB Output is correct
16 Correct 6 ms 5844 KB Output is correct
17 Correct 6 ms 5844 KB Output is correct
18 Correct 5 ms 5844 KB Output is correct
19 Correct 7 ms 5880 KB Output is correct
20 Correct 5 ms 5844 KB Output is correct
21 Correct 6 ms 5844 KB Output is correct
22 Correct 3 ms 5808 KB Output is correct
23 Correct 3 ms 5800 KB Output is correct
24 Correct 3 ms 5844 KB Output is correct
25 Correct 3 ms 5872 KB Output is correct
26 Correct 3 ms 5844 KB Output is correct
27 Correct 3 ms 5844 KB Output is correct
28 Correct 4 ms 5892 KB Output is correct
29 Correct 3 ms 5844 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 2 ms 5716 KB Output is correct
3 Correct 2 ms 5716 KB Output is correct
4 Correct 3 ms 5844 KB Output is correct
5 Correct 3 ms 5844 KB Output is correct
6 Correct 3 ms 5844 KB Output is correct
7 Correct 3 ms 5844 KB Output is correct
8 Correct 3 ms 5800 KB Output is correct
9 Correct 4 ms 5804 KB Output is correct
10 Correct 3 ms 5844 KB Output is correct
11 Correct 3 ms 5844 KB Output is correct
12 Correct 4 ms 5844 KB Output is correct
13 Correct 3 ms 5844 KB Output is correct
14 Correct 3 ms 5844 KB Output is correct
15 Correct 6 ms 5844 KB Output is correct
16 Correct 6 ms 5844 KB Output is correct
17 Correct 6 ms 5844 KB Output is correct
18 Correct 5 ms 5844 KB Output is correct
19 Correct 7 ms 5880 KB Output is correct
20 Correct 5 ms 5844 KB Output is correct
21 Correct 6 ms 5844 KB Output is correct
22 Correct 3 ms 5808 KB Output is correct
23 Correct 3 ms 5800 KB Output is correct
24 Correct 3 ms 5844 KB Output is correct
25 Correct 3 ms 5872 KB Output is correct
26 Correct 3 ms 5844 KB Output is correct
27 Correct 3 ms 5844 KB Output is correct
28 Correct 4 ms 5892 KB Output is correct
29 Correct 3 ms 5844 KB Output is correct
30 Correct 7 ms 5972 KB Output is correct
31 Correct 8 ms 5972 KB Output is correct
32 Correct 14 ms 6032 KB Output is correct
33 Correct 13 ms 5972 KB Output is correct
34 Correct 11 ms 6016 KB Output is correct
35 Correct 4 ms 6012 KB Output is correct
36 Correct 4 ms 6016 KB Output is correct
37 Correct 4 ms 5972 KB Output is correct
38 Correct 236 ms 6112 KB Output is correct
39 Correct 243 ms 6120 KB Output is correct
40 Correct 276 ms 6132 KB Output is correct
41 Correct 26 ms 6100 KB Output is correct
42 Correct 24 ms 6172 KB Output is correct
43 Correct 21 ms 6068 KB Output is correct
44 Correct 139 ms 6064 KB Output is correct
45 Correct 80 ms 6036 KB Output is correct
46 Correct 180 ms 6060 KB Output is correct
47 Correct 10 ms 6068 KB Output is correct
48 Correct 9 ms 5972 KB Output is correct
49 Correct 12 ms 5972 KB Output is correct
50 Correct 5 ms 5972 KB Output is correct
51 Correct 7 ms 5972 KB Output is correct
52 Correct 5 ms 5972 KB Output is correct
53 Correct 5 ms 5972 KB Output is correct
54 Correct 5 ms 5972 KB Output is correct
55 Correct 6 ms 5944 KB Output is correct
56 Correct 4 ms 5876 KB Output is correct
57 Correct 3 ms 5940 KB Output is correct
58 Correct 4 ms 5972 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5844 KB Output is correct
2 Correct 3 ms 5844 KB Output is correct
3 Correct 4 ms 5844 KB Output is correct
4 Execution timed out 5062 ms 14920 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 44 ms 8916 KB Output is correct
3 Correct 58 ms 10400 KB Output is correct
4 Correct 57 ms 10800 KB Output is correct
5 Correct 51 ms 13056 KB Output is correct
6 Correct 58 ms 13112 KB Output is correct
7 Correct 60 ms 13092 KB Output is correct
8 Correct 60 ms 13116 KB Output is correct
9 Correct 61 ms 13040 KB Output is correct
10 Correct 70 ms 13048 KB Output is correct
11 Correct 90 ms 13072 KB Output is correct
12 Correct 91 ms 13208 KB Output is correct
13 Correct 90 ms 13324 KB Output is correct
14 Correct 86 ms 13916 KB Output is correct
15 Correct 118 ms 16184 KB Output is correct
16 Correct 82 ms 13376 KB Output is correct
17 Correct 77 ms 13348 KB Output is correct
18 Correct 77 ms 13416 KB Output is correct
19 Correct 581 ms 13252 KB Output is correct
20 Correct 719 ms 13100 KB Output is correct
21 Correct 769 ms 13144 KB Output is correct
22 Correct 1091 ms 13168 KB Output is correct
23 Correct 1240 ms 13260 KB Output is correct
24 Correct 1141 ms 13144 KB Output is correct
25 Correct 1184 ms 13136 KB Output is correct
26 Correct 1965 ms 13200 KB Output is correct
27 Correct 1970 ms 13192 KB Output is correct
28 Correct 1787 ms 13152 KB Output is correct
29 Correct 2935 ms 13336 KB Output is correct
30 Correct 4151 ms 13328 KB Output is correct
31 Correct 2514 ms 13412 KB Output is correct
32 Correct 2858 ms 13752 KB Output is correct
33 Correct 2430 ms 14624 KB Output is correct
34 Execution timed out 5074 ms 15896 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #5
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5716 KB Output is correct
2 Correct 3 ms 5844 KB Output is correct
3 Correct 4 ms 5844 KB Output is correct
4 Correct 845 ms 11960 KB Output is correct
5 Correct 843 ms 13248 KB Output is correct
6 Correct 1188 ms 15168 KB Output is correct
7 Correct 1329 ms 16332 KB Output is correct
8 Correct 1261 ms 16228 KB Output is correct
9 Correct 1351 ms 16208 KB Output is correct
10 Correct 1289 ms 16224 KB Output is correct
11 Correct 1297 ms 16212 KB Output is correct
12 Correct 1296 ms 16204 KB Output is correct
13 Correct 1300 ms 16208 KB Output is correct
14 Correct 109 ms 9256 KB Output is correct

Subtask #6
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 2 ms 5716 KB Output is correct
3 Correct 2 ms 5716 KB Output is correct
4 Correct 3 ms 5844 KB Output is correct
5 Correct 3 ms 5844 KB Output is correct
6 Correct 3 ms 5844 KB Output is correct
7 Correct 3 ms 5844 KB Output is correct
8 Correct 3 ms 5800 KB Output is correct
9 Correct 4 ms 5804 KB Output is correct
10 Correct 3 ms 5844 KB Output is correct
11 Correct 3 ms 5844 KB Output is correct
12 Correct 4 ms 5844 KB Output is correct
13 Correct 3 ms 5844 KB Output is correct
14 Correct 3 ms 5844 KB Output is correct
15 Correct 6 ms 5844 KB Output is correct
16 Correct 6 ms 5844 KB Output is correct
17 Correct 6 ms 5844 KB Output is correct
18 Correct 5 ms 5844 KB Output is correct
19 Correct 7 ms 5880 KB Output is correct
20 Correct 5 ms 5844 KB Output is correct
21 Correct 6 ms 5844 KB Output is correct
22 Correct 3 ms 5808 KB Output is correct
23 Correct 3 ms 5800 KB Output is correct
24 Correct 3 ms 5844 KB Output is correct
25 Correct 3 ms 5872 KB Output is correct
26 Correct 3 ms 5844 KB Output is correct
27 Correct 3 ms 5844 KB Output is correct
28 Correct 4 ms 5892 KB Output is correct
29 Correct 3 ms 5844 KB Output is correct
30 Correct 7 ms 5972 KB Output is correct
31 Correct 8 ms 5972 KB Output is correct
32 Correct 14 ms 6032 KB Output is correct
33 Correct 13 ms 5972 KB Output is correct
34 Correct 11 ms 6016 KB Output is correct
35 Correct 4 ms 6012 KB Output is correct
36 Correct 4 ms 6016 KB Output is correct
37 Correct 4 ms 5972 KB Output is correct
38 Correct 236 ms 6112 KB Output is correct
39 Correct 243 ms 6120 KB Output is correct
40 Correct 276 ms 6132 KB Output is correct
41 Correct 26 ms 6100 KB Output is correct
42 Correct 24 ms 6172 KB Output is correct
43 Correct 21 ms 6068 KB Output is correct
44 Correct 139 ms 6064 KB Output is correct
45 Correct 80 ms 6036 KB Output is correct
46 Correct 180 ms 6060 KB Output is correct
47 Correct 10 ms 6068 KB Output is correct
48 Correct 9 ms 5972 KB Output is correct
49 Correct 12 ms 5972 KB Output is correct
50 Correct 5 ms 5972 KB Output is correct
51 Correct 7 ms 5972 KB Output is correct
52 Correct 5 ms 5972 KB Output is correct
53 Correct 5 ms 5972 KB Output is correct
54 Correct 5 ms 5972 KB Output is correct
55 Correct 6 ms 5944 KB Output is correct
56 Correct 4 ms 5876 KB Output is correct
57 Correct 3 ms 5940 KB Output is correct
58 Correct 4 ms 5972 KB Output is correct
59 Correct 2 ms 5844 KB Output is correct
60 Correct 3 ms 5844 KB Output is correct
61 Correct 4 ms 5844 KB Output is correct
62 Execution timed out 5062 ms 14920 KB Time limit exceeded
63 Halted 0 ms 0 KB -