Submission #557517

#	Time	Username	Problem	Language	Result	Execution time	Memory
557517		MDSPro	Sorting (IOI15_sorting)	C++14	0 / 100	3 ms	468 KiB

sorting

// MDSPro
// #include "sorting.h"
#include <bits/stdc++.h>

#define trav(i,n) for(int i = 0; i < (n); i++)
#define pb push_back
#define se second
#define fi first
#define all(x) (x).begin(),(x).end()

using namespace std;
using ll = long long;
using ld = long double;
using pii = pair<int,int>;
using vi = vector<int>;

const ld PI = 3.141592653589793;
const ll MOD = 1e9+7;
const int INF = 1e9;
const ll INFLL = 4e18;
const double EPS = 1e-9;
const int SIZE = 1000*1007;

int findSwapPairs(int n, int s[], int m, int x[], int y[], int p[], int q[]) {
    auto isSorted = [&n,&s]()->bool{
        for(int i = 1; i < n; ++i){
            if(s[i-1] > s[i]) return false;
        }
        return true;
    };
    
    int ans = 0;
    for(int j = 0; j < n; ++j){
        swap(s[x[j]],s[y[j]]);
        // if(isSorted()) break;
        
        int mn = s[j];
        int mni = j;
        
        for(int i = j+1; i < n; ++i){
            if(mn > s[i]) {
                mni = i;
                mn = s[i];
            }
        }
        swap(s[j],s[mni]);
        p[j] = j;
        q[j] = mni;
        ans++;
    }
    
    for(int i = ans; i < m; ++i) p[i] = q[i] = 0;
    if(isSorted()) return ans;
    
    p[m-1] = 0; q[m-1] = 1;
    return m;
}

// int main(){
//     int n = 5;
//     int arr[] = {-2,104,-45,14,12};
    
//     for(int i: arr) cout << i << " ";
//     cout << endl << endl;
    
//     int m = 7;
//     int x[] = {0,0,0,0,0,0,0};
//     int y[] = {1,1,1,1,1,1,1};
//     int p[m] = {0};
//     int q[m] = {0};
    
//     int r = findSwapPairs(n,arr,m,x,y,p,q);
//     cout << r << " swaps is need!\n";
//     for(int i = 0; i < m; ++i){
//         cout << "swap " << p[i] << " and " << q[i] << ".\n";
//     }
// }

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