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답안 #417576

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
417576 2021-06-04T01:30:30 Z flappybird Simurgh (IOI17_simurgh) C++14
30 / 100
 2878 ms 5692 KB 
#include "simurgh.h"

#include <bits/stdc++.h>
#include <cassert>
using namespace std;
typedef int ll;

#define MAX 1010
#define MAXS 10

ll N, M;
ll sp[MAX][MAXS];
ll depth[MAX];
vector<ll> adj[MAX], tree[MAX], back[MAX], ans[MAX];
vector<ll> query;
vector<ll> U, V;
ll vis[MAX];
bool ck[MAX];
ll isroyal[MAX];
ll treeres;
ll leaf[MAX];
ll adj2[MAX][MAX];
vector<ll> leafv;

void dfs(ll x = 0, ll p = -1, ll d = 0) {
	sp[x][0] = p;
	depth[x] = d;
	ll i;
	vis[x] = 1;
	for (i = 1; i < MAXS; i++) sp[x][i] = sp[sp[x][i - 1]][i - 1];
	for (auto v : adj[x]) if (!vis[v]) dfs(v, x, d + 1);
}
//{a, b}={c, d}인지 체크
bool chk(ll a, ll b, ll c, ll d) {
	if (a > b) swap(a, b);
	if (c > d) swap(c, d);
	return a == c && b == d;
}

ll getline(ll u, ll v) {
	ll i;
	for (i = 0; i < M; i++) if (chk(u, v, U[i], V[i])) return i;
	return -1;
}

ll getline(ll i) {
	return getline(U[i], V[i]);
}

ll lca(ll u, ll v) {
	if (depth[u] != depth[v]) {
		if (depth[u] < depth[v]) swap(u, v);
		ll i;
		for (i = MAXS - 1; i >= 0; i--) if (depth[sp[u][i]] >= depth[v]) u = sp[u][i];
	}
	if (u == v) return u;
	ll i;
	for (i = MAXS - 1; i >= 0; i--) if (sp[u][i] != sp[v][i]) u = sp[u][i], v = sp[v][i];
	return sp[v][0];
}

ll dis(ll u, ll v) {
	return depth[u] + depth[v] - 2 * depth[lca(u, v)];
}

void erase(vector<ll>& v, ll a) {
	ll i;
	for (i = 0; i < v.size(); i++) if (v[i] == a) break;
	v.erase((v.begin() + i));
}

ll p(ll r, ll x) {
	if (lca(r, x) == x) {
		for (auto v : adj[x]) {
			if (lca(v, r) == v && lca(x, v) == x) return v;
		}
	}
	else return sp[x][0];
}

ll a(ll i) {
	if (sp[U[i]][0] == V[i]) return U[i];
	else return V[i];
}

//v is parent
std::vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
	ll cnt = 0;
	N = n, M = u.size();
	ll i;
	for (i = 0; i < M; i++) adj[u[i]].push_back(v[i]), adj[v[i]].push_back(u[i]);
	dfs();
	for (i = 0; i < M; i++) {
		if (lca(u[i], v[i]) == u[i]) swap(u[i], v[i]);
		if (sp[u[i]][0] == v[i]) tree[u[i]].push_back(v[i]), tree[v[i]].push_back(u[i]);
		else back[u[i]].push_back(v[i]), back[v[i]].push_back(u[i]);
	}
	U = u, V = v;
	for (i = 0; i < N; i++) {
		for (auto v : tree[i]) {
			if (i < v) query.push_back(getline(i, v));
		}
	}
	cnt++;
	treeres = count_common_roads(query);
	ll k, m;
	for (k = 0; k < N; k++) isroyal[k] = -1;
	for (k = 0; k < N; k++) {
		for (m = 0; m < back[k].size(); k++) {
			ll v1 = k, v2 = back[k][m];
			ll l = lca(v1, v2);
			ll x = -1;
			for (i = v1; i != l; i = sp[i][0]) {
				if (isroyal[i] != -1) {
					x = i;
					break;
				}
			}
			for (i = v2; i != l; i = sp[i][0]) {
				if (isroyal[i] != -1) {
					x = i;
					break;
				}
			}
			if (x != -1) {
				query.push_back(getline(v1, v2));
				erase(query, getline(x, sp[x][0]));
				cnt++;
				ll r0 = treeres - count_common_roads(query) - isroyal[x];
				query.push_back(getline(x, sp[x][0]));
				for (i = v1; i != l; i = sp[i][0]) {
					if (isroyal[i] != -1) continue;
					erase(query, getline(i, sp[i][0]));
					cnt++;
					ll res = treeres - count_common_roads(query);
					if (res != r0) isroyal[i] = 1;
					else isroyal[i] = 0;
					query.push_back(getline(i, sp[i][0]));
				}
				for (i = v2; i != l; i = sp[i][0]) {
					if (isroyal[i] != -1) continue;
					erase(query, getline(i, sp[i][0]));
					cnt++;
					ll res = treeres - count_common_roads(query);
					if (res != r0) isroyal[i] = 1;
					else isroyal[i] = 0;
					query.push_back(getline(i, sp[i][0]));
				}
				erase(query, getline(v1, v2));
			}
			else {
				query.push_back(getline(v1, v2));
				map<ll, ll> mp;
				for (ll j = v1; (j != l); j = sp[j][0]) {
					ll e = getline(j, sp[j][0]);
					erase(query, e);
					cnt++;
					ll res = count_common_roads(query) - treeres;
					mp[j] = res;
					query.push_back(e);
				}
				for (ll j = v2; (j != l); j = sp[j][0]) {
					ll e = getline(j, sp[j][0]);
					erase(query, e);
					cnt++;
					ll res = count_common_roads(query) - treeres;
					mp[j] = res;
					query.push_back(e);
				}
				erase(query, getline(v1, v2));
				set<ll> st;
				for (ll j = v1; (j != l); j = sp[j][0]) st.insert(mp[j]);
				for (ll j = v2; (j != l); j = sp[j][0]) st.insert(mp[j]);
				if (st.size() == 1) {
					if (*st.begin() >= 0) {
						for (ll j = v1; (j != l); j = sp[j][0]) isroyal[j] = 0;
						for (ll j = v2; (j != l); j = sp[j][0]) isroyal[j] = 0;
					}
					else {
						for (ll j = v1; (j != l); j = sp[j][0]) isroyal[j] = 1;
						for (ll j = v2; (j != l); j = sp[j][0]) isroyal[j] = 1;
					}
				}
				else {
					if (*st.begin() == -1) {
						for (ll j = v1; (j != l); j = sp[j][0]) isroyal[j] = -mp[j];
						for (ll j = v2; (j != l); j = sp[j][0]) isroyal[j] = -mp[j];
					}
					else {
						for (ll j = v1; (j != l); j = sp[j][0]) isroyal[j] = 1 - mp[j];
						for (ll j = v2; (j != l); j = sp[j][0]) isroyal[j] = 1 - mp[j];
					}
				}
			}
		}
	};
	vector<ll> ans;
	for (i = 0; i < N; i++) {
		for (auto x : adj[i]) {
			if (p(i, x) == i) continue;
			if (adj2[x][i]) continue;
			erase(query, getline(x, p(i, x)));
			ll e = getline(i, x);
			query.push_back(e);
			cnt++;
			ll res = count_common_roads(query) + isroyal[a(getline(x, p(i, x)))] - treeres;
			query.push_back(getline(x, p(i, x)));
			erase(query, e);
			adj2[i][x] = adj2[x][i] = 1;
			if (res == 1) ans.push_back(e);
		}
	}
	for (i = 1; i < N; i++) if (isroyal[i]) ans.push_back(getline(i, sp[i][0]));
	return ans;
}

Compilation message

simurgh.cpp: In function 'void erase(std::vector<int>&, ll)':
simurgh.cpp:68:16: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |  for (i = 0; i < v.size(); i++) if (v[i] == a) break;
      |              ~~^~~~~~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:109:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |   for (m = 0; m < back[k].size(); k++) {
      |               ~~^~~~~~~~~~~~~~~~
simurgh.cpp: In function 'll p(ll, ll)':
simurgh.cpp:79:1: warning: control reaches end of non-void function [-Wreturn-type]
   79 | }
      | ^

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 0 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 0 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct
14 Correct 9 ms 588 KB correct
15 Correct 8 ms 588 KB correct
16 Correct 9 ms 716 KB correct
17 Correct 6 ms 588 KB correct
18 Correct 2 ms 556 KB correct
19 Correct 7 ms 588 KB correct
20 Correct 6 ms 588 KB correct
21 Correct 5 ms 588 KB correct
22 Correct 4 ms 588 KB correct
23 Correct 4 ms 588 KB correct
24 Correct 4 ms 644 KB correct
25 Correct 1 ms 588 KB correct
26 Correct 3 ms 588 KB correct
27 Correct 3 ms 588 KB correct
28 Correct 2 ms 588 KB correct
29 Correct 1 ms 588 KB correct
30 Correct 3 ms 588 KB correct
31 Correct 3 ms 588 KB correct
32 Correct 3 ms 588 KB correct
33 Correct 4 ms 588 KB correct

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 0 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct
14 Correct 9 ms 588 KB correct
15 Correct 8 ms 588 KB correct
16 Correct 9 ms 716 KB correct
17 Correct 6 ms 588 KB correct
18 Correct 2 ms 556 KB correct
19 Correct 7 ms 588 KB correct
20 Correct 6 ms 588 KB correct
21 Correct 5 ms 588 KB correct
22 Correct 4 ms 588 KB correct
23 Correct 4 ms 588 KB correct
24 Correct 4 ms 644 KB correct
25 Correct 1 ms 588 KB correct
26 Correct 3 ms 588 KB correct
27 Correct 3 ms 588 KB correct
28 Correct 2 ms 588 KB correct
29 Correct 1 ms 588 KB correct
30 Correct 3 ms 588 KB correct
31 Correct 3 ms 588 KB correct
32 Correct 3 ms 588 KB correct
33 Correct 4 ms 588 KB correct
34 Correct 2878 ms 2592 KB correct
35 Correct 2722 ms 2884 KB correct
36 Correct 1379 ms 2600 KB correct
37 Correct 19 ms 1356 KB correct
38 Correct 2836 ms 2792 KB correct
39 Correct 2152 ms 2668 KB correct
40 Correct 1313 ms 2500 KB correct
41 Correct 2869 ms 2788 KB correct
42 Correct 2763 ms 2796 KB correct
43 Correct 882 ms 2184 KB correct
44 Correct 572 ms 2000 KB correct
45 Correct 793 ms 2000 KB correct
46 Correct 466 ms 1988 KB correct
47 Correct 117 ms 1644 KB correct
48 Correct 7 ms 1356 KB correct
49 Incorrect 21 ms 1472 KB WA in grader: NO
50 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Incorrect 2878 ms 5692 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 0 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct
14 Correct 9 ms 588 KB correct
15 Correct 8 ms 588 KB correct
16 Correct 9 ms 716 KB correct
17 Correct 6 ms 588 KB correct
18 Correct 2 ms 556 KB correct
19 Correct 7 ms 588 KB correct
20 Correct 6 ms 588 KB correct
21 Correct 5 ms 588 KB correct
22 Correct 4 ms 588 KB correct
23 Correct 4 ms 588 KB correct
24 Correct 4 ms 644 KB correct
25 Correct 1 ms 588 KB correct
26 Correct 3 ms 588 KB correct
27 Correct 3 ms 588 KB correct
28 Correct 2 ms 588 KB correct
29 Correct 1 ms 588 KB correct
30 Correct 3 ms 588 KB correct
31 Correct 3 ms 588 KB correct
32 Correct 3 ms 588 KB correct
33 Correct 4 ms 588 KB correct
34 Correct 2878 ms 2592 KB correct
35 Correct 2722 ms 2884 KB correct
36 Correct 1379 ms 2600 KB correct
37 Correct 19 ms 1356 KB correct
38 Correct 2836 ms 2792 KB correct
39 Correct 2152 ms 2668 KB correct
40 Correct 1313 ms 2500 KB correct
41 Correct 2869 ms 2788 KB correct
42 Correct 2763 ms 2796 KB correct
43 Correct 882 ms 2184 KB correct
44 Correct 572 ms 2000 KB correct
45 Correct 793 ms 2000 KB correct
46 Correct 466 ms 1988 KB correct
47 Correct 117 ms 1644 KB correct
48 Correct 7 ms 1356 KB correct
49 Incorrect 21 ms 1472 KB WA in grader: NO
50 Halted 0 ms 0 KB -