Submission #306160

#	Time	Username	Problem	Language	Result	Execution time	Memory
306160		cheetose	Arranging Shoes (IOI19_shoes)	C++17	25 / 100	1103 ms	2040 KiB

shoes

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<db> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const int MOD = 998244353;
ll POW(ll a, ll b, ll MMM = MOD) { ll ret = 1; for (; b; b >>= 1, a = (a*a) % MMM)if (b & 1)ret = (ret*a) % MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };
int ddx[] = { -1,-2,1,-2,2,-1,2,1 }, ddy[] = { -2,-1,-2,1,-1,2,1,2 };

int b[20],c[20];
ll count_swaps(Vi a){
	int n=a.size()/2;
	if(n<=8){
		fup(i,0,2*n-1,1)b[i]=a[i];
	    sort(b,b+2*n);
	    int ans=INF;
	    do{
	        bool ok=1;
	        fup(i,0,2*n-1,2){
	            if(b[i]<0 && b[i+1]>0 && b[i]==-b[i+1])continue;
	            ok=0;
	        }
	        if(!ok)continue;
	        int tt=0;
	        fup(i,0,2*n-1,1)c[i]=a[i];
	        fup(i,0,2*n-1,1){
	            fup(j,i,2*n-1,1){
	                if(c[j]==b[i]){
	                    tt+=j-i;
	                    rotate(c+i,c+j,c+j+1);
	                    break;
	                }
	            }
	        }
	        ans=min(ans,tt);
	    }while(next_permutation(b,b+2*n));
	    return ans;
	}
	return 1LL*n*(n-1)/2;
	/*Vi vv;
	Vi p,m;
	fup(i,0,2*n-1,1){
		if(a[i]>0)p.pb(a[i]);
		if(a[i]<0)m.pb(-a[i]),vv.pb(i);
	}
	ll res=0;
	fup(i,0,n-1,1)res+=abs(vv[i]-2*i);
	fup(i,0,n-1,1){
		fup(j,i,n-1,1){
			if(p[j]==m[i]){
				res+=j-i;
				rotate(p.begin()+i,p.begin()+j,p.begin()+j+1);
				break;
			}
		}
	}
	return res;*/
}/*
int main() {
	int n;
	scanf("%d",&n);
	Vi v(2*n,-1);
	fup(i,0,2*n-1,1)scanf("%d",&v[i]);
	printf("%lld\n",count_swaps(v));
}*/

Compilation message (stderr)

shoes.cpp: In function 'll count_swaps(Vi)':
shoes.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
shoes.cpp:48:3: note: in expansion of macro 'fup'
   48 |   fup(i,0,2*n-1,1)b[i]=a[i];
      |   ^~~
shoes.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
shoes.cpp:53:10: note: in expansion of macro 'fup'
   53 |          fup(i,0,2*n-1,2){
      |          ^~~
shoes.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
shoes.cpp:59:10: note: in expansion of macro 'fup'
   59 |          fup(i,0,2*n-1,1)c[i]=a[i];
      |          ^~~
shoes.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
shoes.cpp:60:10: note: in expansion of macro 'fup'
   60 |          fup(i,0,2*n-1,1){
      |          ^~~
shoes.cpp:10:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
shoes.cpp:61:14: note: in expansion of macro 'fup'
   61 |              fup(j,i,2*n-1,1){
      |              ^~~

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