Submission #1014697

#	Time	Username	Problem	Language	Result	Execution time	Memory
1014697		MarwenElarbi	Sorting (IOI15_sorting)	C++17	0 / 100	5 ms	1116 KiB

sorting

#include <bits/stdc++.h>
//#include "sorting.h"
using namespace std;
#define ll long long
#define pb push_back
#define se second
#define fi first
vector<pair<int,int>> tab;
vector<int> x,y;
int cnt=0;
vector<pair<int,int>> daq(int l,int r){
    if(l==r) return {tab[l]};
    int mid=(r+l)/2;
    vector<pair<int,int>> none;
    vector<pair<int,int>> a=daq(l,mid);
    vector<pair<int,int>> b=( mid+1<=r ? daq(mid+1,r) : none);
    int j=0;
    vector<pair<int,int>> cur;
    for (int i = 0; i < (int)a.size(); ++i)
    {
        while(j<(int)b.size()&&b[j].fi<a[i].fi){
            cur.pb(b[j]);
            j++;
        }
        cur.pb(a[i]);
    }
    while(j<(int)b.size()) cur.pb(b[j++]);
    for (int i = 0; i < (int)cur.size(); ++i)
    {
        x.pb(cur[i].se);
        y.pb(i+l);
        for (int j = 0; j < (int)cur.size(); ++j)
        {
            if(cur[j].se==i+l) cur[j].se=cur[i].se;
        }
        cur[i].se=i+l;
    }
    return cur;
}
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    for (int i = 0; i < N; ++i)
    {
        tab.pb({S[i],i});
    }
    /*bool test=(Y[0]==1);
    if(test) swap(tab[0].se,tab[1].se);
    sort(tab.begin(),tab.end());
    for (int i = 0; i < N; ++i) if(tab[i].se==0) swap(tab[i].se,tab[0^test].se);
    P[cnt]=tab[0].se;
    Q[cnt]=0;
    cnt++;
    if(test) swap(tab[0].se,tab[1].se);
    for (int i = 0; i < N; ++i) if(tab[i].se==1) swap(tab[i].se,tab[1^test].se);
    P[cnt]=tab[1].se;
    Q[cnt]=1^test;
    cnt++;
    for (int i = 2; i < N; ++i)
    {
        tab[i]={S[i],i};
    }*/
    daq(0,N-1);
    for (int i = 0; i < (int)x.size(); ++i)
    {
        P[i]=x[i];
    }
    for (int i = 0; i < (int)y.size(); ++i)
    {
        Q[i]=y[i];
    }
    return (int)x.size();
}
/*
int main()
{
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif
    int N, M;
    cin>>N;
    int *S = (int*)malloc(sizeof(int) * (unsigned int)N);
    for (int i = 0; i < N; ++i)
        cin>>S[i];
    cin>>M;
    int *X = (int*)malloc(sizeof(int) * (unsigned int)M), *Y = (int*)malloc(sizeof(int) * (unsigned int)M);
    for (int i = 0; i < M; ++i) {
        cin>>X[i]>>Y[i];    
    }
    int *P = (int*)malloc(sizeof(int) * (unsigned int)M), *Q = (int*)malloc(sizeof(int) * (unsigned int)M);
    int ans = findSwapPairs(N, S, M, X, Y, P, Q);
    cout <<ans<<endl;
    for (int i = 0; i < ans; ++i)
        cout <<P[i]<<" "<<Q[i]<<endl;
    return 0;
}
*/

Compilation message (stderr)

sorting.cpp: In function 'std::vector<std::pair<int, int> > daq(int, int)':
sorting.cpp:32:18: warning: declaration of 'j' shadows a previous local [-Wshadow]
   32 |         for (int j = 0; j < (int)cur.size(); ++j)
      |                  ^
sorting.cpp:17:9: note: shadowed declaration is here
   17 |     int j=0;
      |         ^
sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:40:39: warning: unused parameter 'M' [-Wunused-parameter]
   40 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                   ~~~~^
sorting.cpp:40:46: warning: unused parameter 'X' [-Wunused-parameter]
   40 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                          ~~~~^~~
sorting.cpp:40:55: warning: unused parameter 'Y' [-Wunused-parameter]
   40 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                                   ~~~~^~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 12
• Subtask 3: 0 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 20
• Subtask 6: 0 / 26