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Submission #832327

# Submission time Handle Problem Language Result Execution time Memory
832327 2023-08-21T09:06:24 Z ttamx Sorting (IOI15_sorting) C++14
100 / 100
 223 ms 28356 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<pair<int,int>> res;
	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]];
			res.emplace_back(u,v);
			swap(seq[u],seq[v]);
			swap(pos[seq[u]],pos[seq[v]]);
			cnt++;
		}
	}
	if(gen){
		ans=res;
		while(ans.size()<val)ans.emplace_back(0,0);
	}
	return res.size()<=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);
	for(int i=0;i<l;i++)tie(P[i],Q[i])=ans[i];
	return l;
}

Compilation message

sorting.cpp: In function 'bool chk(int, bool)':
sorting.cpp:38:19: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   38 |   while(ans.size()<val)ans.emplace_back(0,0);
      |         ~~~~~~~~~~^~~~
sorting.cpp:40:19: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   40 |  return res.size()<=val;
      |         ~~~~~~~~~~^~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 300 KB Output is correct
2 Correct 0 ms 296 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 296 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 1 ms 300 KB Output is correct
2 Correct 0 ms 296 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 296 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 304 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 308 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 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 1 ms 300 KB Output is correct
2 Correct 0 ms 296 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 296 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 304 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 308 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 568 KB Output is correct
23 Correct 2 ms 544 KB Output is correct
24 Correct 1 ms 552 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 468 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 564 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 432 KB Output is correct
7 Correct 1 ms 440 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 496 KB Output is correct
10 Correct 1 ms 568 KB Output is correct
11 Correct 1 ms 504 KB Output is correct
12 Correct 1 ms 500 KB Output is correct
13 Correct 1 ms 500 KB Output is correct
14 Correct 1 ms 468 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 564 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 432 KB Output is correct
7 Correct 1 ms 440 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 496 KB Output is correct
10 Correct 1 ms 568 KB Output is correct
11 Correct 1 ms 504 KB Output is correct
12 Correct 1 ms 500 KB Output is correct
13 Correct 1 ms 500 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 182 ms 25428 KB Output is correct
16 Correct 162 ms 26012 KB Output is correct
17 Correct 206 ms 27392 KB Output is correct
18 Correct 75 ms 21364 KB Output is correct
19 Correct 162 ms 22988 KB Output is correct
20 Correct 162 ms 24760 KB Output is correct
21 Correct 172 ms 24948 KB Output is correct
22 Correct 158 ms 22832 KB Output is correct
23 Correct 186 ms 28356 KB Output is correct
24 Correct 214 ms 25360 KB Output is correct
25 Correct 202 ms 27616 KB Output is correct
26 Correct 171 ms 24740 KB Output is correct
27 Correct 152 ms 23136 KB Output is correct
28 Correct 223 ms 25192 KB Output is correct
29 Correct 180 ms 24788 KB Output is correct
30 Correct 122 ms 22856 KB Output is correct
31 Correct 197 ms 25184 KB Output is correct
32 Correct 179 ms 27340 KB Output is correct
33 Correct 202 ms 27836 KB Output is correct
34 Correct 180 ms 25220 KB Output is correct
35 Correct 151 ms 23704 KB Output is correct
36 Correct 68 ms 21448 KB Output is correct
37 Correct 213 ms 26032 KB Output is correct
38 Correct 190 ms 25028 KB Output is correct
39 Correct 197 ms 27708 KB Output is correct