oj.uz

Submission #718591

# Submission time Handle Problem Language Result Execution time Memory
718591 2023-04-04T11:39:54 Z myrcella Sorting (IOI15_sorting) C++17
74 / 100
 1000 ms 49008 KB 
//by szh
#include<bits/stdc++.h>
#include <unordered_map>
using namespace std;

#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}

#include "sorting.h"

const int maxn = 6e5+10;
 
int n,m;
int a[maxn],b[maxn];
pii ans[maxn];
pii p[maxn];
vector <int> q[maxn];
int bg[maxn];
int id[maxn];
pii pos[maxn];	
pii qid[maxn];
 
bool check(int cnt,bool flag) {
	rep(i,0,n) {
		bg[i] = 0;
		while (!q[i].empty()) q[i].pop_back();
		q[i].pb(i);
		id[i] = i;
		b[i] = a[i];
	}
	rep(i,0,cnt) {
		int x=p[i].fi,y=p[i].se;
		if (x==y) continue;
		q[id[x]].pb(y);
		q[id[y]].pb(x);
		swap(id[x],id[y]);
		qid[i] = {id[x],id[y]};
	}
	rep(i,0,n) {
		pos[q[i].back()].fi = q[i][bg[i]];
		pos[a[i]].se = i;
	}
	int hi = 0;
	rep(i,0,cnt) {
		int x = p[i].fi,y=p[i].se;
		if (x!=y) {
    		swap(b[x],b[y]);
    		pos[b[x]].se = x,pos[b[y]].se = y;
    		
    		bg[qid[i].fi]++,bg[qid[i].se]++;
    		pos[q[qid[i].fi].back()].fi = q[qid[i].fi][bg[qid[i].fi]];
    		pos[q[qid[i].se].back()].fi = q[qid[i].se][bg[qid[i].se]];
		}
		pii cur = {0,0};
		while (hi<n and pos[hi].fi==pos[hi].se) hi++;
		if (hi<n) cur = pos[hi];
		x = cur.fi,y=cur.se;
		if (x!=y) {
		    swap(b[x],b[y]);
		    pos[b[x]].se = x,pos[b[y]].se = y;
		}
      	ans[i] = cur;
      	if (flag and hi==n) return true;
	}
	while (hi<n and pos[hi].fi==pos[hi].se) hi++;
	return hi==n;
}
 
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
	n = N,m= M;
    int l=0,r=M;
    rep(i,0,n) a[i] =S[i];
    rep(i,0,M) p[i] = {X[i],Y[i]};
    while (l<r) {
		int mid=l+r>>1;
		if (check(mid,true)) r = mid;
		else l = mid+1;
	}
	check(l,false);
	rep(i,0,l) P[i] = ans[i].fi, Q[i] = ans[i].se;
	return l;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:91:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   91 |   int mid=l+r>>1;
      |           ~^~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 10 ms 14420 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 9 ms 14420 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 10 ms 14420 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 9 ms 14420 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 9 ms 14420 KB Output is correct
11 Correct 8 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 14420 KB Output is correct
2 Correct 7 ms 14460 KB Output is correct
3 Correct 8 ms 14548 KB Output is correct
4 Correct 9 ms 14464 KB Output is correct
5 Correct 9 ms 14548 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 10 ms 14420 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 9 ms 14420 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 9 ms 14420 KB Output is correct
11 Correct 8 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 10 ms 14420 KB Output is correct
14 Correct 7 ms 14460 KB Output is correct
15 Correct 8 ms 14548 KB Output is correct
16 Correct 9 ms 14464 KB Output is correct
17 Correct 9 ms 14548 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 8 ms 14456 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 10 ms 14808 KB Output is correct
22 Correct 9 ms 14804 KB Output is correct
23 Correct 10 ms 14796 KB Output is correct
24 Correct 10 ms 14804 KB Output is correct
25 Correct 10 ms 14824 KB Output is correct
26 Correct 9 ms 14804 KB Output is correct
27 Correct 9 ms 14804 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14676 KB Output is correct
2 Correct 10 ms 14804 KB Output is correct
3 Correct 11 ms 14676 KB Output is correct
4 Correct 10 ms 14676 KB Output is correct
5 Correct 9 ms 14676 KB Output is correct
6 Correct 9 ms 14676 KB Output is correct
7 Correct 10 ms 14676 KB Output is correct
8 Correct 12 ms 14836 KB Output is correct
9 Correct 11 ms 14736 KB Output is correct
10 Correct 13 ms 14676 KB Output is correct
11 Correct 11 ms 14776 KB Output is correct
12 Correct 11 ms 14676 KB Output is correct
13 Correct 13 ms 14676 KB Output is correct
14 Correct 9 ms 14676 KB Output is correct

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14676 KB Output is correct
2 Correct 10 ms 14804 KB Output is correct
3 Correct 11 ms 14676 KB Output is correct
4 Correct 10 ms 14676 KB Output is correct
5 Correct 9 ms 14676 KB Output is correct
6 Correct 9 ms 14676 KB Output is correct
7 Correct 10 ms 14676 KB Output is correct
8 Correct 12 ms 14836 KB Output is correct
9 Correct 11 ms 14736 KB Output is correct
10 Correct 13 ms 14676 KB Output is correct
11 Correct 11 ms 14776 KB Output is correct
12 Correct 11 ms 14676 KB Output is correct
13 Correct 13 ms 14676 KB Output is correct
14 Correct 9 ms 14676 KB Output is correct
15 Correct 380 ms 42816 KB Output is correct
16 Correct 715 ms 45004 KB Output is correct
17 Execution timed out 1035 ms 49008 KB Time limit exceeded
18 Halted 0 ms 0 KB -