Submission #291252

#	Time	Username	Problem	Language	Result	Execution time	Memory
291252		ant101	Board (CEOI13_board)	C++14	40 / 100	1091 ms	1480 KiB

board

#include <iostream>
#include <algorithm>
#include <cstring>
#include <iomanip>
#include <fstream>
#include <cmath>
#include <vector>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <map>
#include <stack>
#include <queue>
#include <assert.h>
#include <limits>
#include <cstdio>
#include <complex>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef double db;
typedef string str;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;
#define mp make_pair
#define f first
#define s second

typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<ld> vd;
typedef vector<str> vs;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<pd> vpd;

#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) (x).rbegin(), (x).rend()
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pf push_front
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)

const int MOD = 1e9+7; // 998244353; // = (119<<23)+1
const int MX = 2e5+5;
const ll INF = 1e18;
const ld PI = 4*atan((ld)1);
const int dx[4] = {0,1,0,-1}, dy[4] = {1,0,-1,0};


namespace io {
    void setIn(string s) { freopen(s.c_str(),"r",stdin); }
    void setOut(string s) { freopen(s.c_str(),"w",stdout); }
    void setIO(string s = "") {
        ios_base::sync_with_stdio(0); cin.tie(0); // fast I/O
        // cin.exceptions(cin.failbit); // ex. throws exception when you try to read letter into int
        if (sz(s)) {
            setIn(s+".in");
            setOut(s+".out");
        } // for USACO
    }
}

using namespace io;

namespace input {
    template<class T> void re(complex<T>& x);
    template<class T1, class T2> void re(pair<T1,T2>& p);
    template<class T> void re(vector<T>& a);
    template<class T, size_t SZ> void re(array<T,SZ>& a);
    
    template<class T> void re(T& x) { cin >> x; }
    void re(double& x) { string t; re(t); x = stod(t); }
    void re(ld& x) { string t; re(t); x = stold(t); }
    template<class Arg, class... Args> void re(Arg& first, Args&... rest) {
        re(first); re(rest...);
    }
    
    template<class T> void re(complex<T>& x) { T a,b; re(a,b); x = cd(a,b); }
    template<class T1, class T2> void re(pair<T1,T2>& p) { re(p.f,p.s); }
    template<class T> void re(vector<T>& a) { F0R(i,sz(a)) re(a[i]); }
    template<class T, size_t SZ> void re(array<T,SZ>& a) { F0R(i,SZ) re(a[i]); }
}

namespace output {
    template<class T1, class T2> void pr(const pair<T1,T2>& x);
    template<class T, size_t SZ> void pr(const array<T,SZ>& x);
    template<class T> void pr(const vector<T>& x);
    template<class T> void pr(const set<T>& x);
    template<class T1, class T2> void pr(const map<T1,T2>& x);
    
    template<class T> void pr(const T& x) { cout << x; }
    template<class Arg, class... Args> void pr(const Arg& first, const Args&... rest) {
        pr(first); pr(rest...);
    }
    
    template<class T1, class T2> void pr(const pair<T1,T2>& x) {
        pr("{",x.f,", ",x.s,"}");
    }
    template<class T> void prContain(const T& x) {
        pr("{");
        bool fst = 1; for (const auto& a: x) pr(!fst?", ":"",a), fst = 0; // const needed for vector<bool>
        pr("}");
    }
    template<class T, size_t SZ> void pr(const array<T,SZ>& x) { prContain(x); }
    template<class T> void pr(const vector<T>& x) { prContain(x); }
    template<class T> void pr(const set<T>& x) { prContain(x); }
    template<class T1, class T2> void pr(const map<T1,T2>& x) { prContain(x); }
    
    void ps() { pr("\n"); }
    template<class Arg> void ps(const Arg& first) {
        pr(first); ps(); // no space at end of line
    }
    template<class Arg, class... Args> void ps(const Arg& first, const Args&... rest) {
        pr(first," "); ps(rest...); // print w/ spaces
    }
}

using namespace output;

using namespace input;

ll add(ll a, ll b) {
    a += b;
    if(a >= MOD) {
        a -= MOD;
    }
    return a;
}
ll sub(ll a, ll b) {
    a -= b;
    if(a < 0) {
        a += MOD;
    }
    return a;
}

ll mul(ll a, ll b) {
    return (a * b)%MOD;
}

void add_self(ll& a, ll b) {
    a = add(a, b);
}
void sub_self(ll& a, ll b) {
    a = sub(a, b);
}
void mul_self(ll& a, ll b) {
    a = mul(a, b);
}

string s1, s2;
vector<ll> p1, p2;

void addone(vector<ll> &p) {
    p[p.size()-1]++;
    R0F (i, p.size()) {
        if (p[i] == 2) {
            p[i] = 0;
            if (i == 0) {
                p.insert(p.begin(), 1);
                break;
            } else {
                p[i-1]++;
            }
        }
    }
}

void subone(vector<ll> &p) {
    p[p.size()-1]--;
    R0F (i, p.size()) {
        if (p[i] == -1) {
            p[i] = 1;
            if (i == 0) {
                p.erase(p.begin());
                break;
            } else {
                p[i-1]--;
            }
        }
    }
}




int main() {
//    setIn("board.in.4d");
    re(s1, s2);
    p1.push_back(1);
    p2.push_back(1);
    F0R (i, s1.length()) {
        if (s1[i] == '1') {
            p1.push_back(0);
        }
        if (s1[i] == '2') {
            p1.push_back(1);
        }
        if (s1[i] == 'L') {
            subone(p1);
        }
        if (s1[i] == 'R') {
            addone(p1);
        }
        if (s1[i] == 'U') {
            p1.pop_back();
        }
    }
    F0R (i, s2.length()) {
        if (s2[i] == '1') {
            p2.push_back(0);
        }
        if (s2[i] == '2') {
            p2.push_back(1);
        }
        if (s2[i] == 'L') {
            subone(p2);
        }
        if (s2[i] == 'R') {
            addone(p2);
        }
        if (s2[i] == 'U') {
            p2.pop_back();
        }
    }
    if (p1.size() > p2.size()) {
        swap(p1, p2);
    }
    ll moves = 0;
    while (p2.size()>p1.size()) {
        moves++;
        p2.pop_back();
    }
    F0R (i, p1.size()) {
        if (p1[i]<p2[i]) {
            swap(p1, p2);
            break;
        } else if (p1[i] > p2[i]) {
            break;
        }
    }
    ll pref = 0;
    ll ans = 1e13;
    F0R (i, p1.size()) {
        if (p1[i] == p2[i]) {
            pref++;
        } else {
            break;
        }
    }
//    ps((p1.size()-pref-1)*2+1+moves);
    do {
//        bool toofar = false;
//        F0R (i, p1.size()) {
//            if (p1.size()-1 <= 20) {
//                break;
//            }
//            if (p1[i] != p2[i]) {
//                toofar = true;
//            }
//        }
        if (pref+20 >= p1.size()) {
            ll cnt = 0;
            ll n1 = 0;
            ll n2 = 0;
            ROF (i, max((ll)p1.size()-20ll, 0ll), p1.size()) {
                n1+=p1[i]*(1ll << cnt);
                n2+=p2[i]*(1ll << cnt);
                cnt++;
            }
            ans = min(ans, moves+n1-n2);
        }
        moves+=2;
        p1.pop_back();
        p2.pop_back();
    } while (p1.size() >= 1ll);
    ps(ans);
    return 0;
}

Compilation message (stderr)

board.cpp: In function 'int main()':
board.cpp:53:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 | #define FOR(i,a,b) for (int i = (a); i < (b); ++i)
      |                                        ^
board.cpp:54:18: note: in expansion of macro 'FOR'
   54 | #define F0R(i,a) FOR(i,0,a)
      |                  ^~~
board.cpp:208:5: note: in expansion of macro 'F0R'
  208 |     F0R (i, s1.length()) {
      |     ^~~
board.cpp:53:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 | #define FOR(i,a,b) for (int i = (a); i < (b); ++i)
      |                                        ^
board.cpp:54:18: note: in expansion of macro 'FOR'
   54 | #define F0R(i,a) FOR(i,0,a)
      |                  ^~~
board.cpp:225:5: note: in expansion of macro 'F0R'
  225 |     F0R (i, s2.length()) {
      |     ^~~
board.cpp:53:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 | #define FOR(i,a,b) for (int i = (a); i < (b); ++i)
      |                                        ^
board.cpp:54:18: note: in expansion of macro 'FOR'
   54 | #define F0R(i,a) FOR(i,0,a)
      |                  ^~~
board.cpp:250:5: note: in expansion of macro 'F0R'
  250 |     F0R (i, p1.size()) {
      |     ^~~
board.cpp:53:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 | #define FOR(i,a,b) for (int i = (a); i < (b); ++i)
      |                                        ^
board.cpp:54:18: note: in expansion of macro 'FOR'
   54 | #define F0R(i,a) FOR(i,0,a)
      |                  ^~~
board.cpp:260:5: note: in expansion of macro 'F0R'
  260 |     F0R (i, p1.size()) {
      |     ^~~
board.cpp:278:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  278 |         if (pref+20 >= p1.size()) {
      |             ~~~~~~~~^~~~~~~~~~~~
board.cpp: In function 'void io::setIn(std::string)':
board.cpp:67:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   67 |     void setIn(string s) { freopen(s.c_str(),"r",stdin); }
      |                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
board.cpp: In function 'void io::setOut(std::string)':
board.cpp:68:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   68 |     void setOut(string s) { freopen(s.c_str(),"w",stdout); }
      |                             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• 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