Submission #1017389

#	Time	Username	Problem	Language	Result	Execution time	Memory
1017389		yeediot	Swap (BOI16_swap)	C++17	100 / 100	144 ms	30920 KiB

swap

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef local
void CHECK();
void setio(){
    freopen("/Users/iantsai/cpp/input.txt","r",stdin);
    freopen("/Users/iantsai/cpp/output.txt","w",stdout);
}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
#define TOI_is_so_de ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);setio();
const int mxn = 2e5 + 5;
int n, p[2 * mxn];
map<pair<int, int>, int>mp;
int get_pos(int id, int a){
    if(id > n) return 0;
    if(mp.count({id, a})) return mp[{id, a}];
    int &v = mp[{id, a}], b = p[id * 2], c = p[id * 2 + 1];
    if(a < b and a < c){
        return v = 0;
    }
    else if(b < c){
        return v = get_pos(id * 2, a) + 1;
    }
    else{
        if(b < a){
            int x = get_pos(id * 2, b), y = get_pos(id * 2 + 1, b);
            if(x <= y) return v = get_pos(id * 2 + 1, a) + 1;
            else if(x > y)return v = get_pos(id * 2, a) + 1;
            //else return v = min(get_pos(id * 2, a), get_pos(id * 2 + 1, a)) + 1;
        }
        else{
            return v = min(get_pos(id * 2, a), get_pos(id * 2 + 1, a)) + 1;
        }
    }
}
void go(int id){
    if(id > n) return;
    int &a = p[id], &b = p[id * 2], &c = p[id * 2 + 1];
    if(a < b and a < c){

    } 
    else if(b < c){
        swap(a, b);
    }
    else{
        swap(a, c);
        if(b > c){
            swap(b, c);
        }
        int x = get_pos(id * 2, b), y = get_pos(id * 2 + 1, b);
        if(x > y){
            swap(b, c);
        }
        else if(x == y){
            //if(get_pos(id * 2, c) < get_pos(id * 2 + 1, c)) swap(b, c);
        }
    }
    go(id * 2); go(id * 2 + 1);
}
void solve(){
    cin >> n;
    for(int i = 1; i <= n; i++) cin >> p[i];
    for(int i = n + 1; i <= 2 * n + 1; i++) p[i] = n + 1;
    go(1);
    for(int i = 1; i <= n; i++){
        cout << p[i] << " \n"[i == n];
    }
}
signed main(){
    TOI_is_so_de;
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    #ifdef local
    CHECK();
    #endif
}
/*
input:
 
*/
#ifdef local
void CHECK(){
    cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
    function<bool(string,string)> compareFiles = [](string p1, string p2)->bool {
        std::ifstream file1(p1);
        std::ifstream file2(p2);
        if(!file1.is_open() || !file2.is_open()) return false;
        std::string line1, line2;
        while (getline(file1, line1) && getline(file2, line2)) {
            if (line1 != line2)return false;
        }
        int cnta = 0, cntb = 0;
        while(getline(file1,line1))cnta++;
        while(getline(file2,line2))cntb++;
        return cntb - cnta <= 1;
    };
    bool check = compareFiles("output.txt","expected.txt");
    if(check) cerr<<"ACCEPTED\n";
    else cerr<<"WRONG ANSWER!\n";
}
#else
#endif

Compilation message (stderr)

swap.cpp: In function 'long long int get_pos(long long int, long long int)':
swap.cpp:70:1: warning: control reaches end of non-void function [-Wreturn-type]
   70 | }
      | ^

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