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Submission #832330

# Submission time Handle Problem Language Result Execution time Memory
832330 2023-08-21T09:08:16 Z ttamx Sorting (IOI15_sorting) C++14
100 / 100
 218 ms 15056 KB 
#include "sorting.h"
#include<bits/stdc++.h>

using namespace std;

int n,m;
vector<int> s,x,y;
vector<pair<int,int>> ans;

bool chk(int val,bool gen=false){
	vector<int> id(n),pos(n),pos2(n),tar(n);
	iota(id.begin(),id.end(),0);
	iota(tar.begin(),tar.end(),0);
	iota(pos2.begin(),pos2.end(),0);
	for(int i=0;i<val;i++)swap(tar[x[i]],tar[y[i]]);
	for(int i=0;i<n;i++)pos[s[i]]=i;
	auto seq=s;
	auto doswap=[&](int u,int v){
		swap(seq[u],seq[v]);
		swap(pos[seq[u]],pos[seq[v]]);
		swap(id[u],id[v]);
		swap(pos2[id[u]],pos2[id[v]]);
	};
	int cnt=0;
	for(int i=0;i<n;i++){
		if(id[pos[i]]!=tar[i]){
			doswap(x[cnt],y[cnt]);
			int u=pos[i],v=pos2[tar[i]];
			if(gen)ans.emplace_back(u,v);
			swap(seq[u],seq[v]);
			swap(pos[seq[u]],pos[seq[v]]);
			cnt++;
		}
	}
	return cnt<=val;
}

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.emplace_back(S[i]);
		x.emplace_back(X[i]);
		y.emplace_back(Y[i]);
	}
	int l=0,r=n-1;
	while(l<r){
		int mid=(l+r)/2;
		auto seq=s;
		if(chk(mid))r=mid;
		else l=mid+1;
	}
	chk(l,true);
	while(ans.size()<l)ans.emplace_back(0,0);
	for(int i=0;i<l;i++)tie(P[i],Q[i])=ans[i];
	return l;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:53:18: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   53 |  while(ans.size()<l)ans.emplace_back(0,0);
      |        ~~~~~~~~~~^~

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 0 ms 212 KB Output is correct
6 Correct 0 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 0 ms 212 KB Output is correct
6 Correct 0 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 0 ms 340 KB Output is correct
11 Correct 0 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 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 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 0 ms 212 KB Output is correct
6 Correct 0 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 0 ms 340 KB Output is correct
11 Correct 0 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 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 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 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 460 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 468 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 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 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 460 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 468 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 136 ms 13696 KB Output is correct
16 Correct 140 ms 14052 KB Output is correct
17 Correct 176 ms 14588 KB Output is correct
18 Correct 71 ms 11948 KB Output is correct
19 Correct 145 ms 13452 KB Output is correct
20 Correct 148 ms 13788 KB Output is correct
21 Correct 179 ms 13804 KB Output is correct
22 Correct 128 ms 14776 KB Output is correct
23 Correct 154 ms 14976 KB Output is correct
24 Correct 200 ms 14812 KB Output is correct
25 Correct 201 ms 14620 KB Output is correct
26 Correct 159 ms 13864 KB Output is correct
27 Correct 138 ms 13424 KB Output is correct
28 Correct 178 ms 14780 KB Output is correct
29 Correct 166 ms 14732 KB Output is correct
30 Correct 117 ms 13888 KB Output is correct
31 Correct 173 ms 15012 KB Output is correct
32 Correct 145 ms 14620 KB Output is correct
33 Correct 181 ms 14736 KB Output is correct
34 Correct 158 ms 14704 KB Output is correct
35 Correct 137 ms 13364 KB Output is correct
36 Correct 74 ms 13076 KB Output is correct
37 Correct 189 ms 15056 KB Output is correct
38 Correct 218 ms 14596 KB Output is correct
39 Correct 171 ms 14696 KB Output is correct