oj.uz

Submission #622421

# Submission time Handle Problem Language Result Execution time Memory
622421 2022-08-04T09:20:19 Z 8e7 Sorting (IOI15_sorting) C++17
74 / 100
 1000 ms 18560 KB 
//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 1 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 1 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 1 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 212 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 1 ms 212 KB Output is correct
3 Correct 1 ms 340 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 1 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 1 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 212 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 1 ms 212 KB Output is correct
15 Correct 1 ms 340 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 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 6 ms 340 KB Output is correct
22 Correct 6 ms 340 KB Output is correct
23 Correct 6 ms 340 KB Output is correct
24 Correct 6 ms 340 KB Output is correct
25 Correct 2 ms 340 KB Output is correct
26 Correct 3 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 63 ms 384 KB Output is correct
2 Correct 73 ms 412 KB Output is correct
3 Correct 64 ms 400 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 4 ms 340 KB Output is correct
6 Correct 8 ms 456 KB Output is correct
7 Correct 27 ms 396 KB Output is correct
8 Correct 65 ms 408 KB Output is correct
9 Correct 68 ms 388 KB Output is correct
10 Correct 68 ms 400 KB Output is correct
11 Correct 58 ms 392 KB Output is correct
12 Correct 27 ms 396 KB Output is correct
13 Correct 57 ms 392 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 63 ms 384 KB Output is correct
2 Correct 73 ms 412 KB Output is correct
3 Correct 64 ms 400 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 4 ms 340 KB Output is correct
6 Correct 8 ms 456 KB Output is correct
7 Correct 27 ms 396 KB Output is correct
8 Correct 65 ms 408 KB Output is correct
9 Correct 68 ms 388 KB Output is correct
10 Correct 68 ms 400 KB Output is correct
11 Correct 58 ms 392 KB Output is correct
12 Correct 27 ms 396 KB Output is correct
13 Correct 57 ms 392 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Execution timed out 1045 ms 18560 KB Time limit exceeded
16 Halted 0 ms 0 KB -