Submission #445745

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
445745	2021-07-19 13:01:36	egod1537	Lamps (JOI19_lamps)	C++14	100 / 100	60 ms	16212 KiB

lamp

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#include <bits/stdc++.h>
using namespace std;
string A, B;
int dp[1000001][3];
char apply(char a, int y) {
  return (y == 0) ? '0' : (y == 1) ? '1' : a;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0), cout.tie(0);
  int n; cin >> n;
  cin >> A >> B;
  memset(dp, 0x3f3f3f3f, sizeof(dp));
  dp[0][2] = 0;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < 3; j++) {
      for (int k = 0; k < 3; k++) {
        int cot = dp[i][j];
        if (j != k && k != 2) cot++;
        if ((i == 0 || apply(A[i - 1], j) == B[i - 1]) &&
          apply(A[i], k) != B[i])
          ++cot;
        dp[i+1][k] = min(dp[i+1][k], cot);
 
 
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• Subtask 1: 6 / 6
• Subtask 2: 41 / 41
• Subtask 3: 4 / 4
• Subtask 4: 49 / 49