Submission #54432

#	Time	Username	Problem	Language	Result	Execution time	Memory
54432		leejseo	Wiring (IOI17_wiring)	C++14	0 / 100	2 ms	576 KiB

wiring

#include <bits/stdc++.h>
#include "wiring.h"
using namespace std;

#define abs(x) std::max(x, -(x))

typedef long long lld;
typedef pair<int, int> pii;

class triple{
	public:
		int x, y, z;
		triple (int x_, int y_, int z_) { x = x_, y = y_, z = z_; }
};

vector<triple> X;
vector<pii>    Y;

lld S[200005];
int con[200001];
int lst[400002];
lld D[200002];

long long min_total_length(vector<int> A, vector<int> B) {
	int N = A.size(), M = B.size();
	int K = N+M;
	int i = 0, j = 0;
	while (i+j < K){
		if (j >= M || (i < N && A[i] <= B[j])){
			X.push_back(triple(A[i], i, 0));
			if (j >= M) Y.push_back(pii(abs(A[i] - B.back()), M-1));
			else Y.push_back(min(pii(abs(A[i]-B[j-1]), j-1), pii(abs(A[i]-B[j]), j)));
			i++;
		}
		else{
			X.push_back(triple(B[j], j, 1));
			if (i >= N) Y.push_back(pii(abs(B[j] - A.back()), N-1));
			else Y.push_back(min(pii(abs(A[i-1]-B[j]), i-1), pii(abs(A[i]-B[j]), i)));
			j++;
		}
	}
	int cur = 0;
	for (int i=0; i<K; i++) con[i] = -2;
	for (int i=0; i<K+K+1; i++) lst[i] = -2;
	lst[K] = -1;
	for (int i=0; i<K; i++){
		if (X[i].z == 1){
			cur++;
			S[i] = X[i].x;
		}
		else{
			cur--;
			S[i] = -X[i].x;
		}
		if (i > 0) S[i] += S[i-1];
		if (lst[cur+K] >= -1) con[i] = lst[cur+K];
		lst[cur+K] = i;
	}
	for (int i=0; i<K; i++){
		D[i] = D[(i-1)%(K+1)] + Y[i].first;
		if (con[i] >= -1){
			int j = con[i];
			D[i] = min(D[i], D[(j % (K+1))] + abs(S[i]-S[j]));
		}
	}
	return D[K-1];
}

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