oj.uz

Submission #133632

# Submission time Handle Problem Language Result Execution time Memory
133632 2019-07-21T07:06:26 Z ckodser Sorting (IOI15_sorting) C++14
100 / 100
 352 ms 36928 KB 
#include "sorting.h"
#include<bits/stdc++.h>

#define ll int
#define pb push_back
#define ld long double
#define mp make_pair
#define F first
#define S second
#define pii pair<ll,ll> 

using namespace :: std;

const ll maxn=6e5+500;
const ll inf=1e9+900;

ll per[maxn];
ll s[maxn];
ll x[maxn];
ll y[maxn];
ll koj[maxn];

void swa(ll a,ll b){
    koj[per[a]]=b;
    koj[per[b]]=a;
    swap(per[a],per[b]);
}	
ll n,m;
vector<pii> vec;

void dfs(ll a){
    if(per[a]==a)return;
    vec.pb(mp(a,per[a]));
    swap(per[a],per[per[a]]);
    dfs(a);
}
void copytoper(){
    for(ll i=0;i<n;i++){
	per[i]=s[i];
    }
}
bool mishe(ll mid){
    copytoper();
    for(ll i=0;i<mid;i++){
	swap(per[x[i]],per[y[i]]);
    }
    vec.clear();
    for(ll i=0;i<n;i++){
	dfs(i);
    }
    return (vec.size()<=mid);
}
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    n=N,m=M;
    for(ll i=0;i<n;i++){
	s[i]=S[i];
    }
    for(ll i=0;i<m;i++){
	x[i]=X[i];
	y[i]=Y[i];
    }
    ll b=-1;
    ll e=M;
    while(e-b>1){
	ll mid=(e+b)/2;
	if(mishe(mid)){
	    e=mid;
	}else{
	    b=mid;
	}
    }
    // ans=e;
    copytoper();
    for(ll i=0;i<e;i++){
	swap(per[x[i]],per[y[i]]);
    }
    vec.clear();
    for(ll i=0;i<n;i++){
	dfs(i);
    }
    while(vec.size()<e){
	vec.pb(mp(0,0));
    }
    if(vec.size()>e){
	return 0;
    }
    for(ll i=0;i<n;i++){
	per[i]=i;
	koj[i]=i;
    }
    for(ll i=e-1;i>=0;i--){
	swa(x[i],y[i]);
    }
    vector<pii> ans;
    for(ll i=0;i<e;i++){
	swa(x[i],y[i]);
	pii a=vec[i];
	ll b1=koj[a.F];
	ll b2=koj[a.S];
	ans.pb(mp(b1,b2));
    }
    for(ll i=0;i<e;i++){
	P[i]=ans[i].F;
	Q[i]=ans[i].S;
    }
    copytoper();
    for(ll i=0;i<e;i++){
	swap(per[x[i]],per[y[i]]);
	swap(per[Q[i]],per[P[i]]);
    }
    for(ll i=0;i<n;i++){
	if(per[i]!=i){
	    return 0;
	}
    }
    return e;
}

Compilation message

sorting.cpp: In function 'bool mishe(int)':
sorting.cpp:51:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     return (vec.size()<=mid);
             ~~~~~~~~~~^~~~~
sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:81:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(vec.size()<e){
           ~~~~~~~~~~^~
sorting.cpp:84:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(vec.size()>e){
        ~~~~~~~~~~^~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 3 ms 632 KB Output is correct
22 Correct 3 ms 632 KB Output is correct
23 Correct 3 ms 632 KB Output is correct
24 Correct 3 ms 632 KB Output is correct
25 Correct 3 ms 632 KB Output is correct
26 Correct 3 ms 632 KB Output is correct
27 Correct 3 ms 632 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 632 KB Output is correct
2 Correct 3 ms 632 KB Output is correct
3 Correct 3 ms 632 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 632 KB Output is correct
6 Correct 3 ms 632 KB Output is correct
7 Correct 3 ms 632 KB Output is correct
8 Correct 3 ms 632 KB Output is correct
9 Correct 3 ms 632 KB Output is correct
10 Correct 3 ms 636 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 3 ms 636 KB Output is correct
13 Correct 4 ms 632 KB Output is correct
14 Correct 2 ms 504 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 632 KB Output is correct
2 Correct 3 ms 632 KB Output is correct
3 Correct 3 ms 632 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 632 KB Output is correct
6 Correct 3 ms 632 KB Output is correct
7 Correct 3 ms 632 KB Output is correct
8 Correct 3 ms 632 KB Output is correct
9 Correct 3 ms 632 KB Output is correct
10 Correct 3 ms 636 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 3 ms 636 KB Output is correct
13 Correct 4 ms 632 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 229 ms 23416 KB Output is correct
16 Correct 255 ms 31568 KB Output is correct
17 Correct 295 ms 34548 KB Output is correct
18 Correct 91 ms 26380 KB Output is correct
19 Correct 181 ms 33236 KB Output is correct
20 Correct 192 ms 29544 KB Output is correct
21 Correct 188 ms 31976 KB Output is correct
22 Correct 227 ms 24184 KB Output is correct
23 Correct 281 ms 35404 KB Output is correct
24 Correct 305 ms 34688 KB Output is correct
25 Correct 307 ms 34564 KB Output is correct
26 Correct 199 ms 25052 KB Output is correct
27 Correct 156 ms 23892 KB Output is correct
28 Correct 293 ms 33232 KB Output is correct
29 Correct 239 ms 25684 KB Output is correct
30 Correct 113 ms 23144 KB Output is correct
31 Correct 251 ms 26296 KB Output is correct
32 Correct 256 ms 34188 KB Output is correct
33 Correct 295 ms 34932 KB Output is correct
34 Correct 251 ms 26616 KB Output is correct
35 Correct 180 ms 30568 KB Output is correct
36 Correct 66 ms 21368 KB Output is correct
37 Correct 319 ms 36928 KB Output is correct
38 Correct 296 ms 35204 KB Output is correct
39 Correct 352 ms 35744 KB Output is correct