Submission #903495

#	Time	Username	Problem	Language	Result	Execution time	Memory
903495		VinhLuu	Swap (BOI16_swap)	C++17	10 / 100	124 ms	4548 KiB

swap

// happy

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#include <bits/stdc++.h>
#define int long long
//#define ll long long
#define fi first
#define se second
#define pb push_back
using namespace std;

typedef pair<int,int> pii;
typedef tuple<int,int,int> tp;
const int N = 1e6 + 5;
const int oo = 1e15;
const int mod = 1e9 + 7;
const int base = 29; // >= so pt pb max

int  n, a[N], b[N], p[N], f[N][28];
vector<int> kq;

bool comp(vector<int> &x, vector<int> &y){
    for(int i = 0; i < x.size(); i ++)
        if(x[i] < y[i]) return 1;
        else if(x[i] > y[i]) return 0;

    return 1;
}

void sub1(){
    int full = (1 << (n - 1)) - 1;
    for(int msk = 0; msk <= full; msk ++){
        for(int i = 1; i <= n; i ++) b[i] = a[i];
        for(int i = 1; i < n; i ++)
            if(msk & (1 << (i - 1))) swap(b[i + 1], b[(i + 1)/2]);
        vector<int> vr;
        for(int i = 1; i<= n; i ++) vr.pb(b[i]);
        if(kq.empty() || !comp(kq, vr)) kq = vr;
    }
    for(auto j : kq) cout << j << " ";
}

signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    #define task "v"
    if(fopen(task ".inp","r")){
        freopen(task ".inp","r",stdin);
        freopen(task ".out","w",stdout);
    }

    cin >> n;
    for(int i = 1; i <= n; i ++) cin >> a[i];

    sub1();
}

Compilation message (stderr)

swap.cpp: In function 'bool comp(std::vector<long long int>&, std::vector<long long int>&)':
swap.cpp:25:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for(int i = 0; i < x.size(); i ++)
      |                    ~~^~~~~~~~~~
swap.cpp: In function 'int main()':
swap.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen(task ".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
swap.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen(task ".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 11
• Subtask 3: 0 / 27
• Subtask 4: 0 / 20
• Subtask 5: 0 / 32