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Submission #120254

# Submission time Handle Problem Language Result Execution time Memory
120254 2019-06-24T05:50:55 Z 윤교준(#2950) Highway Tolls (IOI18_highway) C++14
36 / 100
 411 ms 36892 KB 
#include "highway.h"
#include <bits/stdc++.h>
#define eb emplace_back
#define sz(V) ((int)(V).size())
#define upmax(a,b) (a)=max((a),(b))
#define upmin(a,b) (a)=min((a),(b))
#define INF (0x3f3f3f3f)
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;

const int MAXN = 90055;
const int MAXM = 130055;

vector<int> G[MAXN];
int A[MAXM], B[MAXM];

vector<int> TL[MAXN], TR[MAXN];
int TLN, TRN;
int DL[MAXN], DR[MAXN];

int N, M, CA, CB;
int L, EI, TLI, TRI;
int Sidx, Eidx;

map<vector<int>, ll> QMP;
inline ll getAns(vector<int> V) {
	vector<int> T(M, 0);
	for(int v : V) T[v] = 1;
	auto it = QMP.find(T);
	if(QMP.end() != it)
		return it->second;
	ll ret = ask(T);
	QMP[T] = ret;
	return ret;
}

void getOneEdge() {
	int s = 0, e = M-1; for(int m; s < e;) {
		m = (s+e) >> 1;
		vector<int> V;
		for(int i = 0; i <= m; i++) V.eb(i);
		ll t = getAns(V);
		if(t == ll(CA) * L) s = m+1;
		else e = m;
	}
	EI = s;
}

void doBFS(int d[], int sv) {
	fill(d, d+N, INF);
	d[sv] = 0;
	queue<int> PQ; PQ.push(sv);
	for(int idx, dst; !PQ.empty(); PQ.pop()) {
		idx = PQ.front(); dst = d[idx] + 1;
		for(int e : G[idx]) {
			int v = A[e] ^ B[e] ^ idx;
			if(d[v] <= dst) continue;
			d[v] = dst;
			PQ.push(v);
		}
	}
}

void getTL() {
	int s = 0, e = TLN; for(int m; s < e;) {
		m = (s+e+1) >> 1;
		vector<int> V;
		for(int i = m; i <= TLN; i++) {
			for(int v : TL[i]) {
				for(int e : G[v])
					V.eb(e);
			}
		}
		ll t = getAns(V);
		if(t == ll(CA) * L) e = m-1;
		else s = m;
	}
	TLI = s;
}

int getIdx(vector<int> V) {
	int n = sz(V), s = 0, e = n-1; for(int m; s < e;) {
		m = (s+e) >> 1;
		vector<int> E;
		for(int i = 0; i <= m; i++) {
			int v = V[i];
			for(int e : G[v])
				E.eb(e);
		}
		ll t = getAns(E);
		if(t == ll(CA) * L) s = m+1;
		else e = m;
	}
	return V[s];
}

void process() {
	for(int i = 0; i < M; i++)
		if(A[i] > B[i]) swap(A[i], B[i]);
	for(int i = 0; i < M; i++) {
		G[A[i]].eb(i);
		G[B[i]].eb(i);
	}
	L = getAns(vector<int>()) / CA;
	getOneEdge();
	doBFS(DL, A[EI]);
	doBFS(DR, B[EI]);

	for(int i = 0; i < N; i++) {
		if(DL[i] < DR[i]) {
			TL[DL[i]].eb(i);
			upmax(TLN, DL[i]);
		}
		if(DL[i] > DR[i]) {
			TR[DR[i]].eb(i);
			upmax(TRN, DR[i]);
		}
	}

	getTL();
	TRI = L - TLI - 1;

	Sidx = getIdx(TL[TLI]);
	Eidx = getIdx(TR[TRI]);

	answer(Sidx, Eidx);
}

void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
	::N = N;
	::M = sz(U);
	::CA = A;
	::CB = B;
	for(int i = 0; i < M; i++) {
		::A[i] = U[i];
		::B[i] = V[i];
	}
	process();
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 6568 KB Output is correct
2 Correct 10 ms 6648 KB Output is correct
3 Correct 8 ms 6764 KB Output is correct
4 Correct 8 ms 6612 KB Output is correct
5 Correct 7 ms 6648 KB Output is correct
6 Correct 8 ms 6696 KB Output is correct
7 Correct 7 ms 6684 KB Output is correct
8 Correct 8 ms 6648 KB Output is correct
9 Correct 8 ms 6648 KB Output is correct
10 Correct 8 ms 6688 KB Output is correct
11 Correct 8 ms 6696 KB Output is correct
12 Correct 10 ms 6796 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 6776 KB Output is correct
2 Correct 30 ms 8752 KB Output is correct
3 Correct 210 ms 27608 KB Output is correct
4 Correct 220 ms 29300 KB Output is correct
5 Correct 214 ms 29080 KB Output is correct
6 Correct 184 ms 24132 KB Output is correct
7 Correct 240 ms 29368 KB Output is correct
8 Correct 196 ms 27288 KB Output is correct
9 Correct 244 ms 26600 KB Output is correct
10 Correct 220 ms 26296 KB Output is correct
11 Correct 262 ms 25428 KB Output is correct
12 Correct 245 ms 26780 KB Output is correct
13 Correct 227 ms 25260 KB Output is correct
14 Correct 310 ms 26260 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 8500 KB Output is correct
2 Correct 49 ms 10600 KB Output is correct
3 Correct 77 ms 14072 KB Output is correct
4 Correct 208 ms 29972 KB Output is correct
5 Correct 194 ms 28212 KB Output is correct
6 Correct 184 ms 26932 KB Output is correct
7 Correct 281 ms 28572 KB Output is correct
8 Correct 191 ms 27268 KB Output is correct
9 Correct 222 ms 29272 KB Output is correct

Subtask #4
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 6744 KB Output is correct
2 Correct 29 ms 8792 KB Output is correct
3 Correct 168 ms 19864 KB Output is correct
4 Correct 246 ms 25528 KB Output is correct
5 Correct 229 ms 23756 KB Output is correct
6 Correct 240 ms 24108 KB Output is correct
7 Correct 221 ms 23288 KB Output is correct
8 Correct 235 ms 24048 KB Output is correct
9 Correct 254 ms 29032 KB Output is correct
10 Correct 226 ms 28688 KB Output is correct
11 Correct 233 ms 24920 KB Output is correct
12 Correct 216 ms 25180 KB Output is correct
13 Correct 312 ms 26580 KB Output is correct
14 Correct 301 ms 26912 KB Output is correct
15 Correct 227 ms 22004 KB Output is correct
16 Correct 194 ms 19972 KB Output is correct
17 Correct 226 ms 26116 KB Output is correct
18 Correct 289 ms 27412 KB Output is correct
19 Correct 225 ms 23632 KB Output is correct
20 Correct 235 ms 25552 KB Output is correct
21 Correct 184 ms 26880 KB Output is correct
22 Correct 247 ms 27168 KB Output is correct
23 Correct 268 ms 34284 KB Output is correct
24 Incorrect 306 ms 36256 KB Output isn't correct
25 Halted 0 ms 0 KB -

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 8728 KB Output is correct
2 Correct 34 ms 8888 KB Output is correct
3 Correct 246 ms 28468 KB Output is correct
4 Correct 281 ms 30220 KB Output is correct
5 Correct 294 ms 36348 KB Output is correct
6 Correct 319 ms 36892 KB Output is correct
7 Correct 283 ms 34268 KB Output is correct
8 Correct 311 ms 31732 KB Output is correct
9 Correct 268 ms 23492 KB Output is correct
10 Correct 277 ms 24164 KB Output is correct
11 Correct 296 ms 32264 KB Output is correct
12 Correct 321 ms 32296 KB Output is correct
13 Correct 267 ms 34036 KB Output is correct
14 Correct 326 ms 33128 KB Output is correct
15 Correct 322 ms 33660 KB Output is correct
16 Correct 304 ms 31200 KB Output is correct
17 Correct 214 ms 31772 KB Output is correct
18 Correct 268 ms 31536 KB Output is correct
19 Correct 258 ms 31892 KB Output is correct
20 Correct 259 ms 32780 KB Output is correct
21 Correct 411 ms 35228 KB Output is correct

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 8924 KB Output is correct
2 Correct 35 ms 8808 KB Output is correct
3 Correct 270 ms 30036 KB Output is correct
4 Correct 297 ms 29364 KB Output is correct
5 Correct 245 ms 31660 KB Output is correct
6 Correct 346 ms 32788 KB Output is correct
7 Correct 275 ms 29248 KB Output is correct
8 Correct 245 ms 29752 KB Output is correct
9 Correct 293 ms 30240 KB Output is correct
10 Correct 318 ms 34004 KB Output is correct
11 Correct 327 ms 33348 KB Output is correct
12 Correct 332 ms 33772 KB Output is correct
13 Correct 284 ms 26720 KB Output is correct
14 Correct 250 ms 24012 KB Output is correct
15 Correct 262 ms 23432 KB Output is correct
16 Correct 241 ms 24088 KB Output is correct
17 Correct 311 ms 31684 KB Output is correct
18 Correct 264 ms 30680 KB Output is correct
19 Correct 282 ms 32748 KB Output is correct
20 Correct 285 ms 32024 KB Output is correct
21 Correct 312 ms 35144 KB Output is correct
22 Correct 330 ms 33648 KB Output is correct
23 Correct 275 ms 36296 KB Output is correct
24 Correct 325 ms 33672 KB Output is correct
25 Correct 311 ms 32744 KB Output is correct
26 Correct 285 ms 33136 KB Output is correct
27 Partially correct 254 ms 33304 KB Output is partially correct
28 Correct 231 ms 31612 KB Output is correct
29 Correct 239 ms 29240 KB Output is correct
30 Correct 223 ms 26884 KB Output is correct
31 Partially correct 238 ms 32276 KB Output is partially correct
32 Correct 244 ms 31540 KB Output is correct
33 Correct 234 ms 31572 KB Output is correct
34 Partially correct 258 ms 32712 KB Output is partially correct
35 Correct 217 ms 31620 KB Output is correct
36 Incorrect 268 ms 32876 KB Output isn't correct
37 Halted 0 ms 0 KB -