Submission #1040809

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040809		YassineBenYounes	The Collection Game (BOI21_swaps)	C++17	15 / 100	42 ms	1296 KiB

swaps

#include<bits/stdc++.h>
//#include<chrono>
//#include<random>
#include "swaps.h"
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD)
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM)
int dx[8] = {1, 0, 0, -1, 1, 1, -1, -1};
int dy[8] = {0, 1, -1, 0, 1, -1, -1, 1};
#define endl "\n"
#define ss second
#define ff first
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define vi vector<int>
#define vii vector<pair<int,int>>
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd  pair<double,double>
#define vdd  vector<pdd>
#define speed ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pbds tree<pii, null_type, less<pii>,rb_tree_tag, tree_order_statistics_node_update>
using namespace __gnu_pbds;
using namespace std;
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
////////////////////Only Clear Code//////////////////////////
 
void usaco_problem(){
    freopen("milkvisits.in", "r", stdin);
    freopen("milkvisits.out", "w", stdout);
}
 
void init(){
    #ifndef ONLINE_JUDGE
 
freopen("input.txt", "r", stdin);
 
freopen("output.txt", "w", stdout);
 
#endif // ONLINE_JUDGE
}
const int mx = 1005;
const int LOG = 22;
const int inf = 1e9;
const ll mod = 1e9+7;
const int sq = 320;
int n;
 
vi cur;
 
bool comp[mx][mx];
/*
void schedule(int i, int j){
    cur.pb(i > j);
}
 
vi visit(){
    vi v = cur;
    cur.clear();
    return v;
}*/
 
vi recur(vi v){
    if(v.size() == 1)return v;
    int md = v.size()/2;
    vi a, b;
    for(int i = 0; i < v.size();i++){
        if(i < md){
            a.pb(v[i]);
        }
        else{
            b.pb(v[i]);
        }
    }
    a = recur(a);
    b = recur(b);
    /*cout << v.size() << endl;
    for(int x : a){
        cout << x << " ";
    }
    cout << endl;
    for(int x : b){
        cout << x << " ";
    }
    cout << endl;*/
    /*for(int i = 0; i < a.size();i++){
        for(int j = 0;j < b.size();j++){
            schedule(a[i], b[j]);
        }
    }
    vi res = visit();*/
    int x = 0, y = 0;
    vi ans;
    while(x < a.size() && y < b.size()){
        int k = comp[a[x]][b[y]];
        if(k == 1){
            ans.pb(a[x]);
            x++;
        }
        else{
            ans.pb(b[y]);
            y++;
        }
    }
    while(x < a.size()){
        ans.pb(a[x]);
        x++;
    }
    while(y < b.size()){
        ans.pb(b[y]);
        y++;
    }
    return ans;
}
 
void solve(int N, int v){
    n = N;
    vi x;
    for(int i = 1; i <= n;i++){
        x.pb(i);
    }
    vii vec;
    for(int k = 1; k < n;k++){
        for(int r = 0; r <= 1;r++){
            for(int i = 0; i+k < n;i++){
                if((i/k) % 2 == r){
                    schedule(i+1, i+k+1);
                    vec.pb({i+1, i+k+1});
                }
            }
            vi res = visit();
            for(int i = 0; i < res.size();i++){
                comp[vec[i].ff][vec[i].ss] = res[i];
                //cout << vec[i].ff << " " << vec[i].ss << " " << res[i] << endl;
            }
            vec.clear();
        }
    }
    vi a = recur(x);
    /*for(int x : a){
        cout << x << " ";
    }
    cout << endl;*/
    answer(a);
}
/*
int32_t main(){
    init();
    speed;
    solve(4, 50);
}*/
/*
    NEVER GIVE UP!
    DOING SMTHNG IS BETTER THAN DOING NTHNG!!!
    Your Guide when stuck:
    - Continue keyword only after reading the whole input
    - Don't use memset with testcases
    - Check for corner cases(n=1, n=0)
    - Check where you declare n(Be careful of declaring it globally and in main)
*/

Compilation message (stderr)

swaps.cpp: In function 'std::vector<int> recur(std::vector<int>)':
swaps.cpp:75:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |     for(int i = 0; i < v.size();i++){
      |                    ~~^~~~~~~~~~
swaps.cpp:102:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  102 |     while(x < a.size() && y < b.size()){
      |           ~~^~~~~~~~~~
swaps.cpp:102:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  102 |     while(x < a.size() && y < b.size()){
      |                           ~~^~~~~~~~~~
swaps.cpp:113:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |     while(x < a.size()){
      |           ~~^~~~~~~~~~
swaps.cpp:117:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  117 |     while(y < b.size()){
      |           ~~^~~~~~~~~~
swaps.cpp: In function 'void solve(int, int)':
swaps.cpp:140:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  140 |             for(int i = 0; i < res.size();i++){
      |                            ~~^~~~~~~~~~~~
swaps.cpp: In function 'void usaco_problem()':
swaps.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     freopen("milkvisits.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
swaps.cpp:38:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     freopen("milkvisits.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
swaps.cpp: In function 'void init()':
swaps.cpp:44:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
swaps.cpp:46:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3-1: 0 / 3
• Subtask 3-2: 0 / 2
• Subtask 4-1: 0 / 9
• Subtask 4-2: 0 / 6
• Subtask 5-1: 0 / 9
• Subtask 5-2: 0 / 6
• Subtask 6-1: 0 / 21
• Subtask 6-2: 0 / 14
• Subtask 7-1: 0 / 9
• Subtask 7-2: 0 / 6