Submission #636040

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
636040	2022-08-27T18:06:20 Z	Bruteforceman	Sorting (IOI15_sorting)	C++11	74 / 100	1000 ms	18524 KB

sorting

//Challenge: Accepted
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r){
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 200005
#define mod 1000000007
#define pii pair<int, int>
#define ff first
#define ss second
#include "sorting.h"
 
int findSwapPairs(int n, int S[], int M, int X[], int Y[], int P[], int Q[]) {
	//int low = -1, up = M;
	vector<int> pos(n), rev(n);
 
	auto getp = [&] (int k) {
		vector<int> ret(n);
		vector<int> a(n);
		for (int i = 0;i < n;i++) a[i] = i;
		//[0, mid)
		for (int i = k-1;i >= 0;i--) {
			swap(a[X[i]], a[Y[i]]);	
		}
		for (int i = 0;i < n;i++) {
			pos[a[i]] = i;
			rev[i] = a[i];
			ret[a[i]] = S[i];
		}
		return ret;
	};
	for (int up = 0;up <= M;up++) {
		vector<int> v = getp(up);	
		vector<bool> vis(n, 0);
		vector<pii> sw;
		for (int i = 0;i < n;i++) {
			if (vis[i]) continue;
			int cur = i;
			do {
				vis[cur] = 1;
				if (!vis[v[cur]]) sw.push_back({cur, v[cur]});
				cur = v[cur];
			} while (!vis[cur]);
		}
		if (sw.size() > up) continue;
		reverse(sw.begin(), sw.end());	
		for (int i = 0;i < up;i++) {
			int vx = rev[X[i]], vy = rev[Y[i]];	
			swap(rev[X[i]], rev[Y[i]]);
			swap(pos[vx], pos[vy]);
			if (i < sw.size()) {
				P[i] = pos[sw[i].ff];
				Q[i] = pos[sw[i].ss];
			} else {
				P[i] = Q[i] = 0;
			}
		}
		return up;
	}
	return M;
	/*
	while (low < up - 1) {
		int mid = (low + up) / 2;
		vector<int> v = getp(mid);
		vector<bool> vis(n, 0);
		int num = n;
		for (int i = 0;i < n;i++) {
			if (vis[i]) continue;
			int cur = i;
			do {
				vis[cur] = 1;
				cur = v[cur];
			} while (!vis[cur]);
			num--;
		}
		if (num <= mid) up = mid;
		else low = mid;
	}
 
	vector<int> v = getp(up);	
	vector<bool> vis(n, 0);
	vector<pii> sw;
	for (int i = 0;i < n;i++) {
		if (vis[i]) continue;
		int cur = i;
		do {
			vis[cur] = 1;
			if (!vis[v[cur]]) sw.push_back({cur, v[cur]});
			cur = v[cur];
		} while (!vis[cur]);
	}
	reverse(sw.begin(), sw.end());	
	for (int i = 0;i < up;i++) {
		int vx = rev[X[i]], vy = rev[Y[i]];	
		swap(rev[X[i]], rev[Y[i]]);
		swap(pos[vx], pos[vy]);
		P[i] = pos[sw[i].ff];
		Q[i] = pos[sw[i].ss];
	}
	return up;
	*/
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:55:17: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   55 |   if (sw.size() > up) continue;
      |       ~~~~~~~~~~^~~~
sorting.cpp:61:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |    if (i < sw.size()) {
      |        ~~^~~~~~~~~~~

Subtask #1

8.0 / 8.0

#	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	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	1 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	1 ms	212 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	1 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	1 ms	212 KB	Output is correct
4	Correct	1 ms	212 KB	Output is correct
5	Correct	1 ms	212 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	1 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	1 ms	212 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	1 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	1 ms	212 KB	Output is correct
16	Correct	1 ms	212 KB	Output is correct
17	Correct	1 ms	212 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	5 ms	384 KB	Output is correct
22	Correct	4 ms	340 KB	Output is correct
23	Correct	5 ms	340 KB	Output is correct
24	Correct	4 ms	436 KB	Output is correct
25	Correct	2 ms	340 KB	Output is correct
26	Correct	2 ms	340 KB	Output is correct
27	Correct	4 ms	340 KB	Output is correct

Subtask #5

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	55 ms	396 KB	Output is correct
2	Correct	64 ms	468 KB	Output is correct
3	Correct	62 ms	444 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	3 ms	340 KB	Output is correct
6	Correct	7 ms	448 KB	Output is correct
7	Correct	24 ms	468 KB	Output is correct
8	Correct	59 ms	460 KB	Output is correct
9	Correct	61 ms	456 KB	Output is correct
10	Correct	61 ms	460 KB	Output is correct
11	Correct	51 ms	468 KB	Output is correct
12	Correct	24 ms	460 KB	Output is correct
13	Correct	52 ms	468 KB	Output is correct
14	Correct	1 ms	340 KB	Output is correct

Subtask #6

0 / 26.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	55 ms	396 KB	Output is correct
2	Correct	64 ms	468 KB	Output is correct
3	Correct	62 ms	444 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	3 ms	340 KB	Output is correct
6	Correct	7 ms	448 KB	Output is correct
7	Correct	24 ms	468 KB	Output is correct
8	Correct	59 ms	460 KB	Output is correct
9	Correct	61 ms	456 KB	Output is correct
10	Correct	61 ms	460 KB	Output is correct
11	Correct	51 ms	468 KB	Output is correct
12	Correct	24 ms	460 KB	Output is correct
13	Correct	52 ms	468 KB	Output is correct
14	Correct	1 ms	340 KB	Output is correct
15	Execution timed out	1033 ms	18524 KB	Time limit exceeded
16	Halted	0 ms	0 KB	-