제출 #648805

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
648805		YassineBenYounes	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1092 ms	3136 KiB

shoes

/*
ID: Yassine BenYounes
TASK: time
LANG: C++
*/
#include<bits/stdc++.h>
 
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pbds tree<int, null_type, less<int>,rb_tree_tag, tree_order_statistics_node_update>
using namespace __gnu_pbds;*/
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)
ll modd(ll x, ll n){while(x < 0){x += n;}return (x % n);} // modulo for negative numbers
int dx[8] = {0, -1, 0, 1, 1, 1, -1, -1};
int dy[8] = {-1, 0, 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);
using namespace std;
 
void init(){
    #ifndef ONLINE_JUDGE
 
freopen("input.txt", "r", stdin);
 
freopen("output.txt", "w", stdout);
 
#endif // ONLINE_JUDGE
}
 
const int mx = 2005;
const ll mod = 1e9+7;
const int inf = 1e9;

long long count_swaps(std::vector<int> S){
    int ans = 0;
    int n = S.size();
    for(int i = 0; i < n;i+=2){
        int j = i;
        while(j < n && S[i] != -S[j]){
            j++;
        }
        ans += j-i-1;
        /*cout << i << " " << j << endl;
        for(int x = 0; x < n;x++){
            cout << S[x] << " ";
        }
        cout << endl;*/
        for(int x = j;x > i;x--){
            S[x] = S[x-1];
        }
        if(S[i] > 0)ans++;
    }
    return ans;
}

/*
int main(){
    //ofstream fout ("teamwork.out");
    //ifstream fin ("teamwork.in");
    init();
    speed;
    cout << count_swaps({-2, 2, 2, -2, -2, 2}) << endl;
    
}*/

/*
    NEVER GIVE UP!
    DOING SMTHNG IS BETTER THAN DOING NTHNG!!!
*/

컴파일 시 표준 에러 (stderr) 메시지

shoes.cpp: In function 'void init()':
shoes.cpp:40:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
shoes.cpp:42:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 20 / 20
• Subtask 6: 0 / 15