Submission #917322

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
917322	2024-01-27 19:36:56	amirhoseinfar1385	Lamps (JOI19_lamps)	C++17	4 / 100	35 ms	27816 KiB

lamp

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#include<bits/stdc++.h>
using namespace std;
const int maxn=1000000+10;
int dp[maxn][2][3],inf=maxn+10;
int main(){
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int n;
  string s,ss;
  cin>>n>>s>>ss;
  for(int i=0;i<2;i++){
    for(int j=0;j<3;j++){
      dp[0][i][j]=inf;
    }
  }
  dp[0][0][2]=0;
  for(int ind=1;ind<=n;ind++){
    for(int i=0;i<2;i++){
      for(int j=0;j<2;j++){
        dp[ind][i][j]=min(dp[ind-1][i^1][j]+(i==1),min(dp[ind-1][i^1][j^1]+(i==1),dp[ind-1][i^1][2]+(i==1))+1);
        dp[ind][i][j]=min(dp[ind-1][i][j],min(dp[ind-1][i][j^1],dp[ind-1][i][2])+1);  
      }
      dp[ind][i][2]=min(dp[ind-1][i][0],min(dp[ind-1][i][1],dp[ind-1][i][2]));
      dp[ind][i][2]=min(dp[ind][i][2],min(dp[ind-1][i^1][0],min(dp[ind-1][i^1][1],dp[ind-1][i^1][2]))+(i==1));
    }
    if(s[ind-1]==ss[ind-1]){
      dp[ind][0][(s[ind-1]-'0')^1]=inf;
      dp[ind][1][(s[ind-1]-'0')]=inf;
 
 
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• Subtask 1: 0 / 6
• Subtask 2: 0 / 41
• Subtask 3: 4 / 4
• Subtask 4: 0 / 49