Submission #433472

#	Time	Username	Problem	Language	Result	Execution time	Memory
433472		cgiosy	Painting Walls (APIO20_paint)	C++17	100 / 100	460 ms	14620 KiB

paint

#include <bits/stdc++.h>
using namespace std;
int minimumInstructions(int N, int M, int K, vector<int> C, vector<int> A, vector<vector<int>> B) {
	vector<int> G[K];
	for(int i=0; i<M; i++) for(int j:B[i]) G[j].push_back(i);
	int X[M][2]{}, cnt=0, pr=-1e9, r=-1;
	for(int i=0; i<N; i++) {
		bool ok=0;
		for(int j:G[C[i]]) ok|=(X[j][i&1]=X[(j ?: M)-1][~i&1]+1)>=M;
		if(i) for(int j:G[C[i-1]]) X[j][~i&1]=0;
		if(ok && i-r<=M) {
			if(i-pr>M) pr=r, cnt++;
			r=i;
		}
	}
	return r==N-1 ? cnt : -1;
}

• Subtask 1: 12 / 12
• Subtask 2: 15 / 15
• Subtask 3: 13 / 13
• Subtask 4: 23 / 23
• Subtask 5: 37 / 37