제출 #410364

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
410364		ernestn	벽 칠하기 (APIO20_paint)	C++14	0 / 100	1593 ms	1092 KiB

paint

#include "paint.h"

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

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define ROF(i,a,b) for (int i = (a); i > (b); --i)
#define TRAV(a,x) for (auto& a: x)
#define sz(x) int(x.size())
using ll = long long;
using vi = vector<int>;
using pii = pair<int,int>;
#define pb push_back
const int INF = int(1e9);

vector<pii> interval;

int check(int a, vector<int> b){
  if (!b.empty()) for (auto i : b) if (a==i) return 1;
  return 0;
}


int minimumInstructions(
    int N, int M, int K, std::vector<int> C,
    std::vector<int> A, std::vector<std::vector<int>> B) {
      vi window(M,0);
      FOR(m,0,M){
        FOR(i,0,M){
          window[i] += check(C[(m+i)%M], B[m]);
        }
      }

      // interval
      for(auto i : window){
        if (i==M) interval.pb({0,M-1});
      }

      FOR(n,M,N){
        FOR(i,0,M){
          window[i] += (check(C[n], B[(M+n-i)%M]) - check(C[n-M], B[(M+n-i)%M]));
        }
        for(auto i : window){
          if (i==M) interval.pb({n-M,n});
        }
      }
      
      if (interval.empty()) return -1;
      if (interval[0].first != 0) return -1;
      else {
        int r = interval[0].second; int ans=1; int b=1;
        while(b<sz(interval)){
          if ((b+1) < sz(interval) && interval[b+1].first <= r) {
            ++b;
          }
          else if (interval[b].first <= (r+1)){
                r=interval[b].second; ++ans; ++b;
          }
          else break;
        }
        if (r!=(N-1)) return -1;
        else return ans;
      }
}

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