oj.uz

Submission #409018

# Submission time Handle Problem Language Result Execution time Memory
409018 2021-05-20T05:15:01 Z Kevin_Zhang_TW Inside information (BOI21_servers) C++17
100 / 100
 512 ms 42052 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
void debug(auto l, auto r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif

const int MAX_N = 300010, inf = 1e9;

//       res == -10 ? not a query 
//       res == -2 ? no, it doesn't have it
//		 res == -1 ? yes, it has it
//		 res >= 0 ? how many is it
int n, q, res[MAX_N];

//        time, id
vector<pair<int,int>> edge[MAX_N];
//   given time, id how many has this
vector<int> qcnt[MAX_N];
//   given time, whether x has it
vector<pair<int,int>> qif[MAX_N];

bool ban[MAX_N];
int sz[MAX_N], bitv[MAX_N], in_time[MAX_N];
void add(int i, int d) {
	for (;i <= n+q;i += i&-i)
		bitv[i] += d;
}
int qry(int i) {
	int res = 0;
	for (;i;i ^= i&-i)
		res += bitv[i];
	return res;
}
void clean_edge(int x) {
	int sz = 0;
	for (auto [t, u] : edge[x]) if (!ban[u]) edge[x][sz++] = {t, u};
	edge[x].resize(sz);
}

int dfs_sz(int x, int lst) {
	sz[x] = 1;
	for (auto [t, u] : edge[x]) if (!ban[u] && u != lst)
		sz[x] += dfs_sz(u, x);
	return sz[x];
}
int dfs_cen(int x, int allsz, int lst) {
	for (auto [t, u] : edge[x]) if (!ban[u] && u != lst)
		if (sz[u] * 2 > allsz) return dfs_cen(u, allsz, x);
	return x;
}

void dfs_in(int x, int lst_v, int lst) {
	in_time[x] = lst_v;
	add(lst_v, 1);
	for (auto [t, u] : edge[x]) if (u != lst && !ban[u])
		if (t >= lst_v)
			dfs_in(u, t, x);
}
void dfs_out(int x, int lst_v, int lst) {
	in_time[x] = inf;
	add(lst_v, -1);
	for (auto [t, u] : edge[x]) if (u != lst && !ban[u])
		if (t >= lst_v)
			dfs_out(u, t, x);
}

void do_ans(int u) {
	for (int t : qcnt[u]) {
		DE(t, n + q);
		res[t] += qry(t);
	}
	for (auto [t, x] : qif[u]) {
		if (in_time[x] <= t)
			res[t] = -1;
	}
}
void dfs_solve(int x, int lst_v, int lst) {
	do_ans(x);
	for (auto [t, u] : edge[x]) if (!ban[u] && u != lst) {
		if (t > lst_v) continue;
		dfs_solve(u, t, x);
	}
}

void solve(int o = 1) {
	if (ban[o]) return;
	dfs_sz(o, o);
	int cen = dfs_cen(o, sz[o], o);
	clean_edge(cen);
	sort(AI(edge[cen]));

	dfs_in(cen, 1, cen);

	do_ans(cen);

	for (auto [t, u] : edge[cen]) {
		dfs_out(u, t, cen);
		add(in_time[cen], -1);
		add(in_time[cen] = t, 1);
		dfs_solve(u, t, cen);
	}
	ban[cen] = true;

	add(in_time[cen], -1);
	in_time[cen] = inf;

	for (auto [t, x] : edge[cen])
		solve(x);
}

int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> n >> q;
	for (int i = 1;i < n+q;++i) {
		char c;
		int a, b;
		cin >> c;
		if (c == 'C') {
			cin >> a;
			qcnt[a].pb(i);
			res[i] = 0;
			continue;
		}
		cin >> a >> b;
		if (c == 'S') {
			edge[a].pb(i, b);
			edge[b].pb(i, a);
			res[i] = -10;
		}
		if (c == 'Q') {
			res[i] = -2;
			qif[b].pb(i, a);
		}
		DE(i, res[i]);

	}

	fill(in_time, in_time + n + 1, inf);

	solve();

	for (int i = 1;i < n + q;++i) {
		if (res[i] == -10) continue;
		if (res[i] == -2) {
			cout << "no\n";
			continue;
		}
		if (res[i] == -1) {
			cout << "yes\n";
			continue;
		}
		cout << res[i] << '\n';
	}
}

Compilation message

servers.cpp: In function 'void do_ans(int)':
servers.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
servers.cpp:80:3: note: in expansion of macro 'DE'
   80 |   DE(t, n + q);
      |   ^~
servers.cpp: In function 'int32_t main()':
servers.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
servers.cpp:145:3: note: in expansion of macro 'DE'
  145 |   DE(i, res[i]);
      |   ^~

Subtask #1
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 40 ms 24152 KB Output is correct
2 Correct 53 ms 24596 KB Output is correct
3 Correct 50 ms 24392 KB Output is correct
4 Correct 51 ms 24644 KB Output is correct
5 Correct 52 ms 24416 KB Output is correct
6 Correct 50 ms 24368 KB Output is correct

Subtask #2
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 40 ms 24152 KB Output is correct
2 Correct 53 ms 24596 KB Output is correct
3 Correct 50 ms 24392 KB Output is correct
4 Correct 51 ms 24644 KB Output is correct
5 Correct 52 ms 24416 KB Output is correct
6 Correct 50 ms 24368 KB Output is correct
7 Correct 41 ms 24168 KB Output is correct
8 Correct 54 ms 24172 KB Output is correct
9 Correct 49 ms 24104 KB Output is correct
10 Correct 55 ms 24204 KB Output is correct
11 Correct 60 ms 24008 KB Output is correct
12 Correct 50 ms 23928 KB Output is correct

Subtask #3
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 42 ms 24348 KB Output is correct
2 Correct 204 ms 31768 KB Output is correct
3 Correct 197 ms 31740 KB Output is correct

Subtask #4
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 42 ms 24348 KB Output is correct
2 Correct 204 ms 31768 KB Output is correct
3 Correct 197 ms 31740 KB Output is correct
4 Correct 45 ms 24148 KB Output is correct
5 Correct 222 ms 34256 KB Output is correct
6 Correct 137 ms 31928 KB Output is correct
7 Correct 147 ms 32080 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 24260 KB Output is correct
2 Correct 279 ms 38452 KB Output is correct
3 Correct 259 ms 38468 KB Output is correct
4 Correct 235 ms 38332 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 24260 KB Output is correct
2 Correct 279 ms 38452 KB Output is correct
3 Correct 259 ms 38468 KB Output is correct
4 Correct 235 ms 38332 KB Output is correct
5 Correct 39 ms 24216 KB Output is correct
6 Correct 303 ms 41880 KB Output is correct
7 Correct 271 ms 41884 KB Output is correct
8 Correct 289 ms 40984 KB Output is correct
9 Correct 289 ms 40932 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 24236 KB Output is correct
2 Correct 241 ms 34988 KB Output is correct
3 Correct 234 ms 35308 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 24236 KB Output is correct
2 Correct 241 ms 34988 KB Output is correct
3 Correct 234 ms 35308 KB Output is correct
4 Correct 40 ms 24272 KB Output is correct
5 Correct 271 ms 35120 KB Output is correct
6 Correct 278 ms 35212 KB Output is correct

Subtask #9
12.5 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 39 ms 24260 KB Output is correct
2 Correct 313 ms 38500 KB Output is correct
3 Correct 265 ms 38440 KB Output is correct
4 Correct 245 ms 38260 KB Output is correct
5 Correct 38 ms 24220 KB Output is correct
6 Correct 244 ms 35028 KB Output is correct
7 Correct 249 ms 35180 KB Output is correct
8 Correct 274 ms 35600 KB Output is correct
9 Correct 306 ms 35780 KB Output is correct
10 Correct 360 ms 38900 KB Output is correct
11 Correct 355 ms 37432 KB Output is correct

Subtask #10
12.5 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 39 ms 24260 KB Output is correct
2 Correct 313 ms 38500 KB Output is correct
3 Correct 265 ms 38440 KB Output is correct
4 Correct 245 ms 38260 KB Output is correct
5 Correct 38 ms 24220 KB Output is correct
6 Correct 244 ms 35028 KB Output is correct
7 Correct 249 ms 35180 KB Output is correct
8 Correct 274 ms 35600 KB Output is correct
9 Correct 306 ms 35780 KB Output is correct
10 Correct 360 ms 38900 KB Output is correct
11 Correct 355 ms 37432 KB Output is correct
12 Correct 45 ms 24284 KB Output is correct
13 Correct 315 ms 41848 KB Output is correct
14 Correct 289 ms 41824 KB Output is correct
15 Correct 314 ms 41124 KB Output is correct
16 Correct 301 ms 40984 KB Output is correct
17 Correct 41 ms 25104 KB Output is correct
18 Correct 275 ms 35120 KB Output is correct
19 Correct 269 ms 35188 KB Output is correct
20 Correct 280 ms 35624 KB Output is correct
21 Correct 301 ms 36080 KB Output is correct
22 Correct 434 ms 37412 KB Output is correct
23 Correct 512 ms 38460 KB Output is correct
24 Correct 466 ms 38020 KB Output is correct

Subtask #11
17.5 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 40 ms 24260 KB Output is correct
2 Correct 52 ms 24608 KB Output is correct
3 Correct 61 ms 24440 KB Output is correct
4 Correct 55 ms 24660 KB Output is correct
5 Correct 53 ms 24352 KB Output is correct
6 Correct 61 ms 24328 KB Output is correct
7 Correct 42 ms 24176 KB Output is correct
8 Correct 219 ms 34476 KB Output is correct
9 Correct 222 ms 34564 KB Output is correct
10 Correct 40 ms 25040 KB Output is correct
11 Correct 304 ms 41712 KB Output is correct
12 Correct 314 ms 41772 KB Output is correct
13 Correct 249 ms 41544 KB Output is correct
14 Correct 43 ms 25096 KB Output is correct
15 Correct 247 ms 34960 KB Output is correct
16 Correct 259 ms 35152 KB Output is correct
17 Correct 286 ms 35556 KB Output is correct
18 Correct 292 ms 35764 KB Output is correct
19 Correct 367 ms 38908 KB Output is correct
20 Correct 342 ms 37500 KB Output is correct
21 Correct 250 ms 35100 KB Output is correct
22 Correct 255 ms 35108 KB Output is correct
23 Correct 261 ms 35372 KB Output is correct
24 Correct 257 ms 35452 KB Output is correct
25 Correct 345 ms 38352 KB Output is correct
26 Correct 293 ms 34420 KB Output is correct
27 Correct 279 ms 34360 KB Output is correct

Subtask #12
17.5 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 40 ms 24260 KB Output is correct
2 Correct 52 ms 24608 KB Output is correct
3 Correct 61 ms 24440 KB Output is correct
4 Correct 55 ms 24660 KB Output is correct
5 Correct 53 ms 24352 KB Output is correct
6 Correct 61 ms 24328 KB Output is correct
7 Correct 42 ms 24176 KB Output is correct
8 Correct 219 ms 34476 KB Output is correct
9 Correct 222 ms 34564 KB Output is correct
10 Correct 40 ms 25040 KB Output is correct
11 Correct 304 ms 41712 KB Output is correct
12 Correct 314 ms 41772 KB Output is correct
13 Correct 249 ms 41544 KB Output is correct
14 Correct 43 ms 25096 KB Output is correct
15 Correct 247 ms 34960 KB Output is correct
16 Correct 259 ms 35152 KB Output is correct
17 Correct 286 ms 35556 KB Output is correct
18 Correct 292 ms 35764 KB Output is correct
19 Correct 367 ms 38908 KB Output is correct
20 Correct 342 ms 37500 KB Output is correct
21 Correct 250 ms 35100 KB Output is correct
22 Correct 255 ms 35108 KB Output is correct
23 Correct 261 ms 35372 KB Output is correct
24 Correct 257 ms 35452 KB Output is correct
25 Correct 345 ms 38352 KB Output is correct
26 Correct 293 ms 34420 KB Output is correct
27 Correct 279 ms 34360 KB Output is correct
28 Correct 44 ms 24360 KB Output is correct
29 Correct 55 ms 25208 KB Output is correct
30 Correct 51 ms 25092 KB Output is correct
31 Correct 62 ms 25324 KB Output is correct
32 Correct 57 ms 25100 KB Output is correct
33 Correct 51 ms 24992 KB Output is correct
34 Correct 43 ms 25040 KB Output is correct
35 Correct 223 ms 34228 KB Output is correct
36 Correct 145 ms 31860 KB Output is correct
37 Correct 160 ms 32076 KB Output is correct
38 Correct 41 ms 25036 KB Output is correct
39 Correct 328 ms 41784 KB Output is correct
40 Correct 284 ms 42052 KB Output is correct
41 Correct 270 ms 40984 KB Output is correct
42 Correct 268 ms 41000 KB Output is correct
43 Correct 45 ms 25112 KB Output is correct
44 Correct 266 ms 35140 KB Output is correct
45 Correct 240 ms 35172 KB Output is correct
46 Correct 258 ms 35628 KB Output is correct
47 Correct 294 ms 35988 KB Output is correct
48 Correct 385 ms 37476 KB Output is correct
49 Correct 466 ms 38464 KB Output is correct
50 Correct 426 ms 38100 KB Output is correct
51 Correct 167 ms 33244 KB Output is correct
52 Correct 149 ms 32828 KB Output is correct
53 Correct 145 ms 32440 KB Output is correct
54 Correct 143 ms 33060 KB Output is correct
55 Correct 151 ms 32816 KB Output is correct
56 Correct 227 ms 34424 KB Output is correct
57 Correct 250 ms 36052 KB Output is correct
58 Correct 353 ms 34704 KB Output is correct
59 Correct 268 ms 34364 KB Output is correct