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Submission #241863

# Submission time Handle Problem Language Result Execution time Memory
241863 2020-06-26T02:56:00 Z Nightlight Sorting (IOI15_sorting) C++14
100 / 100
 169 ms 20216 KB 
#include <bits/stdc++.h>
using namespace std;
 
int N, M;
int pos[200005];
int S[200005], A[200005];
int X[600005], Y[600005];
int P[600005], Q[600005];
int SA[600005], SB[600005];
int res;
int pp;
bool qq;
void balance(int now) {
	while(pp <= now) swap(S[X[pp]], S[Y[pp]]), pp++;
	while(pp > now + 1) swap(S[X[pp - 1]], S[Y[pp - 1]]), pp--;
}
 
void SWAP(int i, int j) {
  int ii = pos[A[i]];
  int jj = pos[A[j]];
  pos[A[i]] = jj;
  pos[A[j]] = ii;
  swap(A[i], A[j]);
}
 
bool trysort(int limit) {
	int cnt = 0;
//	cout << limit << "\n";
	for(int i = 0; i < N; i++) {
		A[i] = S[i];
//		cout << A[i] << " ";
		pos[A[i]] = i;
	}
//	cout << "\n";
	for(int i = 0; i < N; i++) {
		if(A[i] != i) {
			SA[cnt] = i, SB[cnt] = A[i];
			cnt++;
            if(cnt > limit) return 0;
			SWAP(i, pos[i]);
//			if(qq)for(int j = 0; j < N; j++) cout << A[j] << " ";
//      if(qq)cout << "\n";
		}
	}
	for(int i = cnt; i < limit; i++) {
		SA[i] = 0, SB[i] = 0;
	}
//	cout << cnt << "\n\n";
	return cnt <= limit;
}
 
void findans() {
  for(int i = res - 1; i >= 0; i--) {
    P[i] = pos[SA[i]], Q[i] = pos[SB[i]];
    SWAP(P[i], Q[i]);
    SWAP(X[i + 1], Y[i + 1]);
  }
}
 
int findSwapPairs(int n, int s[], int m, int x[], int y[], int p[], int q[]) {
	N = n, M = m;
	for(int i = 0; i < N; i++) S[i] = s[i];
	for(int i = 1; i <= M; i++) X[i] = x[i - 1], Y[i] = y[i - 1];
	int l = 0, r = N;
  while(l <= r) {
		int mid = (l + r) >> 1;
		balance(mid);
		if(trysort(mid)) {
			res = mid;
			r = mid - 1;
		}else l = mid + 1;
	}
	balance(res);
	qq = 1;
	trysort(res);
  findans();
	for(int i = 0; i < res; i++) {
		p[i] = P[i], q[i] = Q[i];
	}
	return res;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 512 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 4 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 640 KB Output is correct
22 Correct 5 ms 640 KB Output is correct
23 Correct 5 ms 640 KB Output is correct
24 Correct 5 ms 640 KB Output is correct
25 Correct 5 ms 640 KB Output is correct
26 Correct 5 ms 640 KB Output is correct
27 Correct 5 ms 640 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 5 ms 512 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 6 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 6 ms 512 KB Output is correct
10 Correct 6 ms 512 KB Output is correct
11 Correct 6 ms 512 KB Output is correct
12 Correct 5 ms 512 KB Output is correct
13 Correct 5 ms 512 KB Output is correct
14 Correct 5 ms 512 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 5 ms 512 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 6 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 6 ms 512 KB Output is correct
10 Correct 6 ms 512 KB Output is correct
11 Correct 6 ms 512 KB Output is correct
12 Correct 5 ms 512 KB Output is correct
13 Correct 5 ms 512 KB Output is correct
14 Correct 5 ms 512 KB Output is correct
15 Correct 137 ms 17912 KB Output is correct
16 Correct 145 ms 18296 KB Output is correct
17 Correct 161 ms 19320 KB Output is correct
18 Correct 71 ms 12664 KB Output is correct
19 Correct 119 ms 16120 KB Output is correct
20 Correct 136 ms 17016 KB Output is correct
21 Correct 137 ms 17144 KB Output is correct
22 Correct 131 ms 19576 KB Output is correct
23 Correct 157 ms 19964 KB Output is correct
24 Correct 161 ms 19704 KB Output is correct
25 Correct 161 ms 19448 KB Output is correct
26 Correct 128 ms 16632 KB Output is correct
27 Correct 123 ms 15864 KB Output is correct
28 Correct 161 ms 19432 KB Output is correct
29 Correct 157 ms 18684 KB Output is correct
30 Correct 100 ms 14968 KB Output is correct
31 Correct 160 ms 19064 KB Output is correct
32 Correct 155 ms 19320 KB Output is correct
33 Correct 167 ms 19704 KB Output is correct
34 Correct 161 ms 19704 KB Output is correct
35 Correct 125 ms 15864 KB Output is correct
36 Correct 65 ms 13688 KB Output is correct
37 Correct 169 ms 20216 KB Output is correct
38 Correct 162 ms 19448 KB Output is correct
39 Correct 153 ms 19576 KB Output is correct