Submission #1104749

#	Time	Username	Problem	Language	Result	Execution time	Memory
1104749		ezzzay	Board (CEOI13_board)	C++14	40 / 100	650 ms	262144 KiB

board

#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define int long long
#define pb push_back
map<vector<int>,int >dist;
string a,b;
vector<int> has (vector<int> v){
    int n=v.size();
   
    for(int i=n-1;i>=0;i--){
        if(v[i]){
            v[i]=0;
            for(int j=i+1;j<n;j++){
                v[j]=1;
            }
           
            break;
        }
    }
    
    return v;
}
vector<int> nem (vector<int> v){
    int n=v.size();
     bool u=1;
    for(int i=n-1;i>=0;i--){
        if(v[i]==0){
            v[i]=1;
            u=0;
            for(int j=i+1;j<n;j++){
                v[j]=0;
            }
            
            break;
        }
    }
    if(u){
        v.clear();
        v.pb(1);
        for(int i=0;i<n;i++){
            v.pb(0);
        }
    }
    return v;
}
int fun(vector<int>a, vector<int>b){
    if(a.size()!=b.size()){
        if(max(a.size(),b.size())>30)return 1e17;
    }
    reverse(a.begin(),a.end());
    reverse(b.begin(),b.end());
    int x=0;
    for(int i=0;i<a.size();i++){
        if(a[i]){
            x+=(1<<i);
        }
    }
    int y=0;
    for(int i=0;i<b.size();i++){
        if(b[i]){
            y+=(1<<i);
        }
    }
    return abs(x-y);
}
signed main(){
    cin>>a;
    vector<int>x={1},y={1};
   
    
    int lvl=1;
    dist[{1}]=1;
    for(auto c:a){
        if(c=='1'){
            x.pb(0);
            lvl++;
        }
        else if(c=='2'){
            x.pb(1);
            lvl++;
        }
        else if(c=='U'){
            x.pop_back();
            lvl--;
        }
        else if(c=='L'){
            x=has(x);
        }
        else{
           
            x=nem(x);
            
        }
        
        
        dist[x]=lvl;
    }
    lvl=1;
    cin>>a;
    for(auto c:a){
        if(c=='1'){
            y.pb(0);
            lvl++;
        }
        else if(c=='2'){
            y.pb(1);
            lvl++;
        }
        else if(c=='U'){
            y.pop_back();
            lvl--;
        }
        else if(c=='L'){
            y=has(y);
        }
        else{
            y=nem(y);
        }
        dist[y]=lvl;
    }
    if(dist[y]>dist[x]){
        swap(y,x);
    }
    int k=0;
    int p=dist[x];
    while(dist[x]>dist[y]){
        x.pop_back();
        dist[x]= --p;
        k++;
    }
    int ans=k+fun(x,y);
    p=dist[x];
    while(p>1){
        x.pop_back();
        y.pop_back();
        p--;
        k+=2;
        // cout<<k+fun(x,y)<<endl;
        ans=min(ans,k+fun(x,y));
    }
    cout<<ans;
}

Compilation message (stderr)

board.cpp: In function 'long long int fun(std::vector<long long int>, std::vector<long long int>)':
board.cpp:55:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |     for(int i=0;i<a.size();i++){
      |                 ~^~~~~~~~~
board.cpp:61:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for(int i=0;i<b.size();i++){
      |                 ~^~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10