Submission #101101

# Submission time Handle Problem Language Result Execution time Memory
101101 2019-03-16T15:54:56 Z Benq Dojave (COCI17_dojave) C++14
112 / 140
4000 ms 57868 KB
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/rope>

using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
 
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;

typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;

template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;

#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= (a); i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto& a : x)

#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound

#define sz(x) (int)x.size()
#define beg(x) x.begin()
#define en(x) x.end()
#define all(x) beg(x), en(x)
#define resz resize

const int MOD = 1000000007; // 998244353
const ll INF = 1e18;
const int MX = 100001;
const ld PI = 4*atan((ld)1);

template<class T> void ckmin(T &a, T b) { a = min(a, b); }
template<class T> void ckmax(T &a, T b) { a = max(a, b); }

template<class A, class B> A operator+=(A& l, const B& r) { return l = l+r; }
template<class A, class B> A operator-=(A& l, const B& r) { return l = l-r; }
template<class A, class B> A operator*=(A& l, const B& r) { return l = l*r; }
template<class A, class B> A operator/=(A& l, const B& r) { return l = l/r; }

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]); }
}

using namespace input;

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; trav(a,x) pr(!fst?", ":"",a), fst = 0; 
        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, class... Args> void ps(const Arg& first, const Args&... rest) { 
        pr(first," "); ps(rest...); // print w/ spaces
    }
}

using namespace output;

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
        if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO
    }
}

using namespace io;

template<class T> T invGeneral(T a, T b) {
    a %= b; if (a == 0) return b == 1 ? 0 : -1;
    T x = invGeneral(b,a); 
    return x == -1 ? -1 : ((1-(ll)b*x)/a+b)%b;
}

template<class T> struct modInt {
    T val;
    T mod = 0;
    // static const T mod = MOD;

    void normalize() {
        if (mod == 0) return;
        val %= mod; if (val < 0) val += mod;
    }
    modInt(T v = 0, T m = 0) : val(v), mod(m) { normalize(); }
    // modInt(T v = 0, T m = 0) : val(v) { normalize(); }

    explicit operator T() const { return val; }
    friend ostream& operator<<(ostream& os, const modInt& a) { return os << a.val; }
    friend bool operator==(const modInt& a, const modInt& b) { return a.val == b.val; }
    friend bool operator!=(const modInt& a, const modInt& b) { return !(a == b); }

    friend void check(modInt& a, modInt& b) { // make sure all operations are valid
        // comment out if mod is static const
        if (a.mod > 0 && b.mod > 0) { assert(a.mod == b.mod); return; }
        T mod = max(a.mod,b.mod); if (mod == 0) mod = MOD;
        if (a.mod != mod) { a.mod = mod; a.normalize(); }
        if (b.mod != mod) { b.mod = mod; b.normalize(); }
    }
    friend modInt operator+(modInt a, modInt b) {
        check(a,b); a.val += (T)b;
        if (a.val >= a.mod) a.val -= a.mod;
        return a;
    }
    friend modInt operator-(modInt a, modInt b) {
        check(a,b); a.val -= (T)b; 
        if (a.val < 0) a.val += a.mod; 
        return a;
    }
    friend modInt operator-(const modInt& a) { return modInt(0)-a; }

    friend modInt operator*(modInt a, modInt b) {
        check(a,b); a.val = (ll)a.val*(T)b%a.mod; return a;
    }
    friend modInt exp(modInt a, ll p) {
        modInt ans(1,a.mod);
        for (; p; p /= 2, a *= a) if (p&1) ans *= a;
        return ans;
    }
    friend modInt inv(const modInt& a) {
        return {invGeneral(a.val,a.mod),a.mod};
        // return exp(b,b.mod-2) if prime
    }
    friend modInt operator/(modInt a, modInt b) { 
        check(a,b); return a*inv(b); 
    }
};

typedef modInt<int> mi;
typedef pair<mi,mi> pmi;
typedef vector<mi> vmi;
typedef vector<pmi> vpmi;

template<class T, int SZ> struct LazySegTree {
    T mn[2*SZ];
    int lazy[2*SZ]; // set SZ to a power of 2
    
    T comb(T a, T b) {
        if (a.f != b.f) return min(a,b);
        T c; c.f = a.f;
        F0R(i,4) c.s[i] = a.s[i]+b.s[i];
        return c;
    }
    void pull(int ind) {
        mn[ind] = comb(mn[2*ind],mn[2*ind+1]);
    }
    void build(int ind, int L, int R) {
        if (L == R) {
            mn[ind].s[ind%4] = 1;
            return;
        }
        int M = (L+R)/2;
        build(2*ind,L,M); build(2*ind+1,M+1,R);
        pull(ind);
    }
    void push(int ind, int L, int R) {
        mn[ind].f += lazy[ind];
        if (L != R) lazy[2*ind] += lazy[ind], lazy[2*ind+1] += lazy[ind];
        lazy[ind] = 0;
    }

    T qmin(int lo, int hi, int ind = 1, int L = 0, int R = SZ-1) {
        push(ind,L,R);
        if (lo > R || L > hi) return {MOD,{0,0,0,0}};
        if (lo <= L && R <= hi) return mn[ind];
        
        int M = (L+R)/2;
        return comb(qmin(lo,hi,2*ind,L,M), qmin(lo,hi,2*ind+1,M+1,R));
    }
    
    void upd(int lo, int hi, ll inc, int ind = 1, int L = 0, int R = SZ-1) {
        push(ind,L,R);
        if (hi < L || R < lo) return;
        if (lo <= L && R <= hi) {
            lazy[ind] = inc;
            push(ind,L,R);
            return;
        }
        
        int M = (L+R)/2;
        upd(lo,hi,inc,2*ind,L,M); upd(lo,hi,inc,2*ind+1,M+1,R);
        pull(ind);
    }
};

LazySegTree<pair<int,array<int,4>>,1<<20> L;
int M,x[1<<20],pos[1<<20],des;
ll ans;

int main() {
    setIO(); re(M);
    if (M == 1) { pr(2); exit(0); }
    des = (1<<M)-1;
    F0R(i,1<<M) {
        re(x[i]);
        pos[x[i]] = i;
    }
    L.build(1,0,(1<<20)-1);
    // divisible by 4 
    F0R(i,1<<M) if (pos[i] < pos[des^i]) L.upd(pos[i],pos[des^i]-1,1);
    // ps(L.mn[1]);
    ans = 1<<M; ans = ans*(ans+1)/2;
    F0R(i,1<<M) {
        auto a = L.qmin(i,des);
        if (a.f == 0) ans -= a.s[(i+3)%4];
        if (i < pos[des^x[i]]) {
            L.upd(i,(1<<20)-1,-1);
            L.upd(pos[des^x[i]],(1<<20)-1,2);
        } else {
            L.upd(i,(1<<20)-1,-1);
            // ps("WHAT",i,des);
        }
    }
    ps(ans);
    // l > a, r < b 
    // l <= a, r >= b 
}

/* stuff you should look for
    * int overflow, array bounds
    * special cases (n=1?), set tle
    * do smth instead of nothing and stay organized
*/

Compilation message

dojave.cpp: In function 'void io::setIn(std::__cxx11::string)':
dojave.cpp:117:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     void setIn(string s) { freopen(s.c_str(),"r",stdin); }
                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
dojave.cpp: In function 'void io::setOut(std::__cxx11::string)':
dojave.cpp:118:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     void setOut(string s) { freopen(s.c_str(),"w",stdout); }
                             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 33 ms 41336 KB Output is correct
2 Correct 64 ms 41476 KB Output is correct
3 Correct 44 ms 41336 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 58 ms 41464 KB Output is correct
2 Correct 57 ms 41464 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 74 ms 41516 KB Output is correct
2 Correct 69 ms 41464 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 86 ms 41640 KB Output is correct
2 Correct 92 ms 41516 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 109 ms 41760 KB Output is correct
2 Correct 98 ms 41796 KB Output is correct
3 Correct 113 ms 41720 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 249 ms 42528 KB Output is correct
2 Correct 187 ms 42740 KB Output is correct
3 Correct 340 ms 43572 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 238 ms 42504 KB Output is correct
2 Correct 288 ms 43512 KB Output is correct
3 Correct 590 ms 45688 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1096 ms 45612 KB Output is correct
2 Correct 571 ms 45816 KB Output is correct
3 Correct 687 ms 45660 KB Output is correct
# Verdict Execution time Memory Grader output
1 Execution timed out 4070 ms 57868 KB Time limit exceeded
2 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Execution timed out 4051 ms 57828 KB Time limit exceeded
2 Halted 0 ms 0 KB -