Submission #289071

#	Time	Username	Problem	Language	Result	Execution time	Memory
289071		_7_7_	Wiring (IOI17_wiring)	C++14	100 / 100	113 ms	9452 KiB

wiring

#include "wiring.h"
#include <bits/stdc++.h>                                           
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
using namespace __gnu_pbds;
 
//#define int long long
//#pragma GCC optimize("Ofast")
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")
 
 
#define file(s) freopen(s".in","r",stdin); freopen(s".out","w",stdout);
#define fastio ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define all(x) x.begin(), x.end()
#define sz(s) (int)s.size()
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define s second
#define f first
 
 
 
 
typedef pair < long long, long long > pll;    
typedef pair < int, int > pii;  
typedef unsigned long long ull;         
typedef vector < pii > vpii;                                   	
typedef vector < int > vi;
typedef long double ldb;  
typedef long long ll;  
typedef double db;
 
typedef tree < int, null_type, less < int >, rb_tree_tag, tree_order_statistics_node_update > ordered_set;
 
const int inf = 1e9, maxn = 2e5 + 48, mod = 998244353, N = 2e5 + 11;
const int dx[] = {-1, 0, 1, 0}, dy[] = {0, -1, 0, 1}, block = 300;
const pii base = mp(1171, 3307), Mod = mp(1e9 + 7, 1e9 + 9);
const db eps = 1e-12, pi = acos(-1);
const ll INF = 1e18;

int n, m, prv[N];
ll dp[N], s[N];
vpii V;

ll get (int l, int r) {
	return s[r] - (!l ? 0 : s[l - 1]);
}

ll min_total_length(vi r, vi b) {
	n = sz(r), m = sz(b);
	for (auto x : r)
		V.pb(mp(x, 0));

	for (auto x : b) 
		V.pb(mp(x, 1)); 
	
	
	sort(all(V));


	memset(prv, -1, sizeof(prv));

	for (int i = 0; i < sz(V); ++i) {
		s[i] = (!i ? 0 : s[i - 1]) + V[i].f;
		int j = i;
		while (j + 1 < sz(V) && V[i].s == V[j + 1].s) {
			++j; 
			s[j] = s[j - 1] + V[j].f;
		}

		for (int x = i; x <= j; ++x) {
			dp[x] = INF;

			if (i) {
				dp[x] = dp[x - 1] + V[x].f - V[i - 1].f;
				if (x == i)
					prv[x] = i - 1;
				else
					prv[x] = prv[x - 1] - 1;

				if (prv[x] >= 0 && V[x].s == V[prv[x]].s)
					prv[x] = -1;
					
				if (x == 1)
					cerr << prv[x] << endl;

				if (prv[x] >= 0)
					dp[x] = min(dp[x], (!prv[x] ? 0 : dp[prv[x] - 1]) + get(i, x) - get(prv[x], i - 1));
			}

			if (j + 1 < sz(V))
				dp[x] = min((!x ? 0 : dp[x - 1]) + V[j + 1].f - V[x].f, dp[x]);			
		}
		i = j;
	}

/*	for (int i = 0; i < n + m; ++i)
		cerr << V[i].f << ' ' << V[i].s << endl;

	for (int i = 0; i < n + m; ++i)
		cerr << dp[i] << ' ';*/

	return dp[n + m - 1];
}

• Subtask 1: 7 / 7
• Subtask 2: 13 / 13
• Subtask 3: 10 / 10
• Subtask 4: 25 / 25
• Subtask 5: 45 / 45