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Submission #832777

# Submission time Handle Problem Language Result Execution time Memory
832777 2023-08-21T14:52:50 Z aymanrs Sorting (IOI15_sorting) C++14
100 / 100
 178 ms 27340 KB 
#include <bits/stdc++.h>
#include "sorting.h"
using namespace std;
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
	if(is_sorted(S, S+N)) return 0;
	M = min(M, 4*N);
	int p[M], q[M];
	int R, l = 0, r = M-1, m, b = M, cur;
	int cp[N];
	for(int i = 0;i < N;i++) cp[i] = S[i];
	int opt[N], ipt[N], is[N];
	while(l <= r){
		R = 0;
		for(int i = 0;i < N;i++) {
			S[i] = cp[i];
			is[S[i]] = i;
		}
		m = l+r>>1;
		for(int j = 0;j<N;j++) opt[j]=ipt[j]=j;
		for(int j = m;j>=0;j--) {
			swap(ipt[opt[X[j]]], ipt[opt[Y[j]]]);
			swap(opt[X[j]], opt[Y[j]]);
		}
		cur = 0;
		for(int i = 0;i <= m;i++){
			R++;
			swap(is[S[X[i]]], is[S[Y[i]]]);
			swap(S[X[i]], S[Y[i]]);
			swap(ipt[opt[X[i]]], ipt[opt[Y[i]]]);
			swap(opt[X[i]], opt[Y[i]]);
			while(cur < N && is[cur] == ipt[cur])cur++;
			if(cur == N){
				p[R-1] = q[R-1] = 0;
				continue;
			}
			p[R-1] = is[cur];
			q[R-1] = ipt[cur];
			int sipt = S[ipt[cur]];
			swap(S[is[cur]], S[ipt[cur]]);
			swap(is[cur], is[sipt]);
		}
		if(is_sorted(S, S+N)){
			for(int i = 0;i < R;i++) {
				P[i] = p[i];
				Q[i] = q[i];
			}
			b = R;
			r = m-1;
		} else l = m+1;
	}
	return b;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:18:8: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   18 |   m = l+r>>1;
      |       ~^~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 316 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 316 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 107 ms 16460 KB Output is correct
16 Correct 141 ms 24592 KB Output is correct
17 Correct 178 ms 25956 KB Output is correct
18 Correct 36 ms 13384 KB Output is correct
19 Correct 121 ms 25328 KB Output is correct
20 Correct 136 ms 26036 KB Output is correct
21 Correct 123 ms 26044 KB Output is correct
22 Correct 96 ms 21340 KB Output is correct
23 Correct 141 ms 26956 KB Output is correct
24 Correct 169 ms 26540 KB Output is correct
25 Correct 171 ms 26156 KB Output is correct
26 Correct 122 ms 25996 KB Output is correct
27 Correct 112 ms 25388 KB Output is correct
28 Correct 156 ms 26420 KB Output is correct
29 Correct 147 ms 26108 KB Output is correct
30 Correct 92 ms 24972 KB Output is correct
31 Correct 155 ms 26632 KB Output is correct
32 Correct 116 ms 26060 KB Output is correct
33 Correct 165 ms 26624 KB Output is correct
34 Correct 141 ms 26480 KB Output is correct
35 Correct 112 ms 24872 KB Output is correct
36 Correct 51 ms 24352 KB Output is correct
37 Correct 166 ms 27340 KB Output is correct
38 Correct 159 ms 26188 KB Output is correct
39 Correct 170 ms 26344 KB Output is correct