Submission #512539

#	Time	Username	Problem	Language	Result	Execution time	Memory
512539		DJ035	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	20 ms	4780 KiB

shoes

#include "shoes.h"
# pragma GCC optimize ("O3")
# pragma GCC optimize ("Ofast")
# pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>
#define MEM 111111
#define sanic ios_base::sync_with_stdio(0)
#define x first
#define y second
#define pf push_front
#define pb push_back
#define all(v) v.begin(), v.end()
#define sz size()
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pi;
const ll MOD = 1e9+7;
const ll INF = 2e14+7;
ll mul(ll a, ll b){
    return ((a*b)%MOD+MOD)%MOD;
}
ll add(ll a, ll b){
    return ((a+b)%MOD+MOD)%MOD;
}

ll t,n,ans,m,q,k;
ll v[MEM];
long long count_swaps(std::vector<int> s) {
	ll n=s.sz;
	ll ans=0;
	for(int i=n-1; i>=0; i--){
        if(v[i]) continue;
        ll o=0;
        for(int j=i-1; j>=0; j--){
            if(v[j]) {
                o++;
                continue;
            }
            if(-s[j]==s[i]){
                if(s[i]>0) ans += i-j-1-o;
                else ans += i-j-o;
                v[j] = 1;
                v[i] = 1;
                break;
            }
        }
        //cout << i << ' ' << o << ' ' << ans << '\n';
	}
	return ans;
}

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