Submission #103327

#	Time	Username	Problem	Language	Result	Execution time	Memory
103327		RockyB	Wiring (IOI17_wiring)	C++17	30 / 100	326 ms	5896 KiB

wiring

/// In The Name Of God
 
#include <bits/stdc++.h>
 
#define f first
#define s second
 
#define pb push_back
#define pp pop_back
#define mp make_pair
 
#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()
 
#define rep(i, l, r) for (int i = (l); i <= (r); i++)
#define per(i, l, r) for (int i = (l); i >= (r); i--)
 
#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);
 
#define nl '\n'
#define ioi exit(0);
 
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
 
const int N = (int)4e5 + 7;
const int inf = (int)1e9 + 7;
const int mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;
 
const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1};
const int dy[] = {0, 1, 0, -1, 1, -1, 1, -1};
 
using namespace std;
 
 
int n, m;
int a[N], b[N];
 
 
namespace s2 {
	ll get() {
		ll res = 0;
		int mn = min(n, m);
		rep(i, 1, mn) res += b[i] - a[i];
		if (n > m) {
			rep(i, mn + 1, n) res += b[1] - a[i];
		}
		if (n < m) {
			rep(i, mn + 1, m) res += b[i] - a[n];
		}
		return res;
	}
}
namespace s1 {
	int dp[222][222];
	int calc(int v1 = 1, int v2 = 1) {
		if (v1 > n && v2 > m) return 0; 
		if (~dp[v1][v2]) return dp[v1][v2];
		int res = inf;
		/// 1 & 1
		if (v1 <= n && v2 <= m) res = min(res, calc(v1 + 1, v2 + 1));
		/// 1 & 0
		if (v1 <= n) res = min(res, calc(v1 + 1, v2));
		/// 0 & 1
		if (v2 <= m) res = min(res, calc(v1, v2 + 1));
		return dp[v1][v2] = res + abs(b[min(m, v2)] - a[min(n, v1)]);
	}
	ll get() {
		memset(dp, -1, sizeof(dp));
		return calc();
	}
}
namespace s3 {
	pair <int, int> p[N];

	ll dp[1 << 7], dp2[1 << 7];
	
	int prv[N];
	void upd(ll &x, ll y) {
		if (x > y) x = y;
	}
	ll get() {
		rep(i, 1, n) p[i] = {a[i], 0};
		rep(i, 1, m) p[n + i] = {b[i], 1};
		sort (p + 1, p + n + m + 1);
		memset(prv, -1, sizeof(prv));
		int last[2] = {-1, -1};
		rep(i, 1, n + m) {
			if (last[p[i].s ^ 1] != -1) prv[i] = p[i].f - p[last[p[i].s ^ 1]].f;
			last[p[i].s] = i;
		}

		memset(dp, 0x3f, sizeof(dp));
		dp[0] = 0;

		rep(i, 1, n + m) {
			memset(dp2, 0x3f, sizeof(dp2));
			rep(mask, 0, (1 << 7) - 1) {
				if (dp[mask] == linf) continue;
				if (mask & 1) upd(dp2[mask >> 1], dp[mask]);
				else {
					if (prv[i] != -1) upd(dp2[mask >> 1], dp[mask] + prv[i]);
					int to = min(n + m - i, 6);
					rep(j, 1, to) {
						if (p[i].s != p[i + j].s) {
							upd(dp2[(mask >> 1) | (1 << (j - 1))], dp[mask] + p[i + j].f - p[i].f);
						}
					}
					//if (nxt[i].s != -1) upd(dp2[(mask >> 1) | (1 << nxt[i].s)], dp[mask] + nxt[i].f);
				}
			}
			rep(mask, 0, (1 << 7) - 1) {
				dp[mask] = dp2[mask];
			}
		}
		return dp[0];
	}
}
	
ll min_total_length(vector <int> _r, vector <int> _b) {
	n = sz(_r), m = sz(_b);
	rep(i, 1, n) a[i] = _r[i - 1];
	rep(i, 1, m) b[i] = _b[i - 1];
 
	if (a[n] < b[1]) return s2 :: get();
	if (max(n, m) <= 200) return s1 :: get();
	return s3 :: get();
}
 
#ifdef IOI2018
 
namespace read {
 
	void read() {
		int n, m;
		assert(2 == scanf("%d %d", &n, &m));
 
		vector<int> r(n), b(m);
		for(int i = 0; i < n; i++)
			assert(1 == scanf("%d", &r[i]));
		for(int i = 0; i < m; i++)
			assert(1 == scanf("%d", &b[i]));
 
		long long res = min_total_length(r, b);
		printf("%lld\n", res);
		ioi
	}
}
 
int main() {
	#ifdef IOI2018
		freopen ("in.txt", "r", stdin);
	#endif
	read :: read();
	ioi
}
 
#endif

• Subtask 1: 7 / 7
• Subtask 2: 13 / 13
• Subtask 3: 10 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 45