Submission #32345

#	Time	Username	Problem	Language	Result	Execution time	Memory
32345		imaxblue	Board (CEOI13_board)	C++14	100 / 100	16 ms	2628 KiB

board

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp make_pair
#define pb push_back
#define x first
#define y second
#define pii pair<int, int>
#define p3i pair<pii, int>
#define pll pair<ll, ll>
#define p3l pair<pll, ll>
#define lseg L, (L+R)/2, N*2+1
#define rseg (L+R)/2+1, R, N*2+2
#define ub upper_bound
#define lb lower_bound
#define pq priority_queue
#define MN 1000000007
#define fox(k, x) for (int k=0; k<x; ++k)
#define fox1(k, x) for (int k=1; k<=x; ++k)
#define foxr(k, x) for (int k=x-1; k>=0; --k)
#define fox1r(k, x) for (int k=x; k>0; --k)
#define ms multiset
#define flood(x) memset(x, 0x3f3f3f3f, sizeof x)
#define drain(x) memset(x, 0, sizeof x)
#define rng() (rand() >> 3)*rand()

set<int> pre;
string s, t;
bool type;
int p, x;
void flip(int p){
    if (pre.count(p)) pre.erase(p);
    else pre.insert(p);
}
string con(string S){
    type=0; p=0; pre.clear();
    fox(l, S.size()){
        if (S[l]=='1' && type){
            type=0;
            pre.insert(p);
        }
        if (S[l]=='2' && !type){
            type=1;
            pre.insert(p);
        }
        if (S[l]=='1' || S[l]=='2') p++;
        if (S[l]=='U'){
            --p;
            if (pre.count(p)){
                type=!type;
                pre.erase(p);
            }
        }
        if (S[l]=='L'){
            if (type){
                flip(p-1);
            } else {
                x=*--pre.end();
                flip(--x);
            }
            type=!type;
        }
        if (S[l]=='R'){
            if (!type){
                flip(p-1);
            } else {
                x=*--pre.end();
                flip(--x);
            }
            type=!type;
        }
    }
    type=0;
    S="";
    //cout << p << endl;
    fox(l, p){
        if (pre.count(l)) type=!type;
        S+=char(type+'0');
    }
    return S;
}
int main(){
    cin.sync_with_stdio(0);
    cin.tie(0);
    cin >> s;
    s=con(s);
    cin >> t;
    t=con(t);
    //cout << s << ' ' << endl  << t << endl;
    ll a=0, b=0;
    int ans=(1 << 30);
    fox(l, min(s.size(), t.size())){
        a=a*2+s[l]-'0';
        b=b*2+t[l]-'0';
        if (abs(b-a)>400000) break;
        //cout << a << ' ' << b << endl;
        ans=min(ans, int(abs(a-b)+s.size()+t.size()-l*2-2));
    }
    cout << ans << endl;
    return 0;
}

Compilation message (stderr)

board.cpp: In function 'std::__cxx11::string con(std::__cxx11::string)':
board.cpp:18:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define fox(k, x) for (int k=0; k<x; ++k)
                                  ^
board.cpp:37:5: note: in expansion of macro 'fox'
     fox(l, S.size()){
     ^
board.cpp: In function 'int main()':
board.cpp:18:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define fox(k, x) for (int k=0; k<x; ++k)
                                  ^
board.cpp:92:5: note: in expansion of macro 'fox'
     fox(l, min(s.size(), t.size())){
     ^

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