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Submission #73214

# Submission time Handle Problem Language Result Execution time Memory
73214 2018-08-28T04:53:25 Z ainta(#2272) Circus (Balkan15_CIRCUS) C++11
100 / 100
 2037 ms 16896 KB 
#include "circus.h"
#include<stdio.h>
#include<algorithm>
#include<queue>
#include<set>
#define SZ 131072
#define pii pair<int,int>
#define INF 1000000010
using namespace std;
int DP[110000][2], DD[110000], MM, X[110000];
bool v[110000];
int IT[SZ + SZ + 2][2];
set<pii>Set;

struct point {
	int d, fr;
	pii to;
	point() {}
	point(int d_, int fr_, pii to_) {
		d = d_, fr = fr_, to = to_;
	}
	bool operator<(const point &p)const {
		return d>p.d;
	}
};
priority_queue<point>PQ;

int n;

void Ins(int fr, pii to) {
	int num = to.second, x = to.first;
	if (x < fr) {
		if (DP[num][0] <= fr - x)return;
		DP[num][0] = fr - x;
		PQ.push(point(fr - x, fr, to));
	}
	else {
		if (DP[num][1] <= x - fr)return;
		DP[num][1] = x - fr;
		PQ.push(point(x - fr, fr, to));
	}
}

void Do(int x, int d) {
	pii tp = pii(x - d, n + 1);
	auto it = Set.lower_bound(tp);
	if (it != Set.begin()) {
		it--;
		Ins(x, *it);
	}
	tp = pii(x + d, -1);
	it = Set.lower_bound(tp);
	if (it != Set.end()) {
		Ins(x, *it);
	}
}

void Add(int pv, int a, int b) {
	a += SZ;
	IT[a][pv] = b;
	while (a != 1) {
		a >>= 1;
		IT[a][pv] = min(IT[a * 2][pv], IT[a * 2 + 1][pv]);
	}
}

void init(int N, int M, int P[])
{
	n = N;
	MM = M;
	if (n == 0)return;
	int i;
	for (i = 0; i<N; i++)DP[i][0] = DP[i][1] = INF;
	sort(P, P + N);
	for (i = 0; i<n; i++) {
		Set.insert(pii(P[i], i));
		X[i] = P[i];
	}
	Ins(M, pii(P[n - 1], n - 1));
	point tp;
	while (!PQ.empty()) {
		tp = PQ.top();
		PQ.pop();
		int num = tp.to.second, x = tp.to.first;
		if (x < tp.fr) {
			if (tp.d != DP[num][0])continue;
			if (!v[num]) {
				v[num] = true;
				Do(x, tp.d);
			}
			if (num != 0) {
				Ins(tp.fr, pii(P[num - 1], num - 1));
			}
		}
		else {
			if (tp.d != DP[num][1])continue;
			if (!v[num]) {
				v[num] = true;
				Do(x, tp.d);
			}
			if (num != n - 1) {
				Ins(tp.fr, pii(P[num + 1], num + 1));
			}
		}
	}
	for (i = 0; i<n; i++)DD[i] = min(DP[i][0], DP[i][1]);
	for (i = 0; i<n; i++) {
		Add(0, i, DD[i] + X[i]);
		Add(1, i, DD[i] - X[i]);
	}
}
int Get1(int b, int e, int D) {
	if (b>e)return INF;
	b += SZ, e += SZ;
	while (b <= e) {
		if (IT[e][0] <= D)break;
		b = b >> 1;
		e = (e - 1) >> 1;
	}
	if (b>e)return INF;
	while (e < SZ) {
		e = e * 2;
		if (IT[e + 1][0] <= D)e++;
	}
	return D - X[e - SZ];
}
int Get2(int b, int e, int D) {
	if (b>e)return INF;
	b += SZ, e += SZ;
	while (b <= e) {
		if (IT[b][1] <= D)break;
		b = (b + 1) >> 1;
		e = e >> 1;
	}
	if (b>e)return INF;
	while (b < SZ) {
		b = b * 2;
		if (IT[b][1] > D)b++;
	}
	return X[b - SZ] + D;
}
int minLength(int D)
{
	if (!n)return MM - D;
	auto tp = Set.lower_bound(pii(D, -1));
	int mm, i;
	if (tp == Set.end())mm = n;
	else mm = tp->second;
	int t1 = Get1(0, mm - 1, D), t2 = Get2(mm, n - 1, -D);
	return min(min(t1, t2), MM - D);
}

Compilation message

circus.cpp: In function 'int minLength(int)':
circus.cpp:146:10: warning: unused variable 'i' [-Wunused-variable]
  int mm, i;
          ^
grader.cpp: In function 'int main()':
grader.cpp:14:12: warning: unused variable 'max_code' [-Wunused-variable]
  long long max_code;
            ^~~~~~~~
grader.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &M);
  ~~~~~^~~~~~~~~~~~~~~~
grader.cpp:18:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &P[i]);
   ~~~~~^~~~~~~~~~~~~
grader.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &Q);
  ~~~~~^~~~~~~~~~
grader.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &d);
   ~~~~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 185 ms 8824 KB Output is correct
2 Correct 167 ms 8848 KB Output is correct
3 Correct 143 ms 8848 KB Output is correct
4 Correct 171 ms 8872 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8872 KB Output is correct
2 Correct 2 ms 8872 KB Output is correct
3 Correct 2 ms 8872 KB Output is correct
4 Correct 2 ms 8872 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8872 KB Output is correct
2 Correct 2 ms 8872 KB Output is correct
3 Correct 2 ms 8872 KB Output is correct
4 Correct 2 ms 8872 KB Output is correct
5 Correct 5 ms 8872 KB Output is correct
6 Correct 5 ms 8872 KB Output is correct
7 Correct 5 ms 8872 KB Output is correct
8 Correct 5 ms 8872 KB Output is correct

Subtask #4
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8872 KB Output is correct
2 Correct 2 ms 8872 KB Output is correct
3 Correct 2 ms 8872 KB Output is correct
4 Correct 2 ms 8872 KB Output is correct
5 Correct 5 ms 8872 KB Output is correct
6 Correct 5 ms 8872 KB Output is correct
7 Correct 5 ms 8872 KB Output is correct
8 Correct 5 ms 8872 KB Output is correct
9 Correct 614 ms 8892 KB Output is correct
10 Correct 526 ms 8892 KB Output is correct
11 Correct 485 ms 8892 KB Output is correct
12 Correct 642 ms 9328 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 185 ms 8824 KB Output is correct
2 Correct 167 ms 8848 KB Output is correct
3 Correct 143 ms 8848 KB Output is correct
4 Correct 171 ms 8872 KB Output is correct
5 Correct 3 ms 8872 KB Output is correct
6 Correct 2 ms 8872 KB Output is correct
7 Correct 2 ms 8872 KB Output is correct
8 Correct 2 ms 8872 KB Output is correct
9 Correct 5 ms 8872 KB Output is correct
10 Correct 5 ms 8872 KB Output is correct
11 Correct 5 ms 8872 KB Output is correct
12 Correct 5 ms 8872 KB Output is correct
13 Correct 153 ms 9328 KB Output is correct
14 Correct 146 ms 9328 KB Output is correct
15 Correct 153 ms 9328 KB Output is correct
16 Correct 147 ms 9328 KB Output is correct

Subtask #6
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 185 ms 8824 KB Output is correct
2 Correct 167 ms 8848 KB Output is correct
3 Correct 143 ms 8848 KB Output is correct
4 Correct 171 ms 8872 KB Output is correct
5 Correct 3 ms 8872 KB Output is correct
6 Correct 2 ms 8872 KB Output is correct
7 Correct 2 ms 8872 KB Output is correct
8 Correct 2 ms 8872 KB Output is correct
9 Correct 5 ms 8872 KB Output is correct
10 Correct 5 ms 8872 KB Output is correct
11 Correct 5 ms 8872 KB Output is correct
12 Correct 5 ms 8872 KB Output is correct
13 Correct 614 ms 8892 KB Output is correct
14 Correct 526 ms 8892 KB Output is correct
15 Correct 485 ms 8892 KB Output is correct
16 Correct 642 ms 9328 KB Output is correct
17 Correct 153 ms 9328 KB Output is correct
18 Correct 146 ms 9328 KB Output is correct
19 Correct 153 ms 9328 KB Output is correct
20 Correct 147 ms 9328 KB Output is correct
21 Correct 1617 ms 14024 KB Output is correct
22 Correct 1792 ms 14024 KB Output is correct
23 Correct 1743 ms 15640 KB Output is correct
24 Correct 2037 ms 16896 KB Output is correct