Submission #123635

#	Time	Username	Problem	Language	Result	Execution time	Memory
123635		thecodingwizard	CATS (NOI14_cats)	C++11	25 / 25	160 ms	7928 KiB

cats

//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")

#include <bits/stdc++.h>

using namespace std;

template<class T> using min_heap = priority_queue<T, vector<T>, greater<T>>;

#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define F0R1(i, a) for (int i=1; 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 MIN(a, b) a = min(a, b)
#define MAX(a, b) a = max(a, b)

#define INF 1000000010
#define LL_INF 4500000000000000000LL
#define LSOne(S) (S & (-S))
#define EPS 1e-9
#define pA first
#define pB second
#define mp make_pair
#define pb push_back
#define PI acos(-1.0)
// #define MOD (int)(2e+9+11)
#define MOD (int)(1e+9+7)
#define SET(vec, val, size) for (int i = 0; i < size; i++) vec[i] = val;
#define SET2D(arr, val, dim1, dim2) F0R(i, dim1) F0R(j, dim2) arr[i][j] = val;
#define SET3D(arr, val, dim1, dim2, dim3) F0R(i, dim1) F0R(j, dim2) F0R(k, dim3) arr[i][j][k] = val;
#define SET4D(arr, val, dim1, dim2, dim3, dim4) F0R(i, dim1) F0R(j, dim2) F0R(k, dim3) F0R(l, dim4) arr[i][j][k][l] = val;

#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
#define SORT(vec) sort(all(vec))
#define RSORT(vec) sort(vec.rbegin(),vec.rend())

typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vl;

// Source: Benq (https://github.com/bqi343/USACO) [Modified]
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 reA(T A[], int sz);

    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 T1, class T2> void re(pair<T1,T2>& p) { re(p.pA,p.pB); }
    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]); }
    template<class T> void reA(T A[], int sz) { F0R(i, sz) re(A[i]); }
}

using namespace input;

namespace output {
    template<class T1, class T2> void prD(const pair<T1,T2>& x);
    template<class T, size_t SZ> void prD(const array<T,SZ>& x);
    template<class T> void prD(const vector<T>& x);
    template<class T> void prD(const set<T>& x);
    template<class T1, class T2> void prD(const map<T1,T2>& x);

    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 prD(const T& x) { cout << x; }
    template<class Arg, class... Args> void prD(const Arg& first, const Args&... rest) {
        prD(first); prD(rest...);
    }

    template<class T1, class T2> void prD(const pair<T1,T2>& x) {
        prD("{",x.pA,", ",x.pB,"}");
    }
    template<class T> void prDContain(const T& x) {
        prD("{");
        bool fst = 1; for (const auto& a: x) prD(!fst?", ":"",a), fst = 0; // const needed for vector<bool>
        prD("}");
    }
    template<class T, size_t SZ> void prD(const array<T,SZ>& x) { prDContain(x); }
    template<class T> void prD(const vector<T>& x) { prDContain(x); }
    template<class T> void prD(const set<T>& x) { prDContain(x); }
    template<class T1, class T2> void prD(const map<T1,T2>& x) { prDContain(x); }

    void psD() { prD("\n"); }
    template<class Arg> void psD(const Arg& first) {
        prD(first); psD(); // no space at end of line
    }
    template<class Arg, class... Args> void psD(const Arg& first, const Args&... rest) {
        prD(first," "); psD(rest...); // print w/ spaces
    }


    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.pA, " ", x.pB);
    }
    template<class T> void prContain(const T& x) {
        bool fst = 1; for (const auto& a: x) pr(!fst?" ":"",a), fst = 0; // const needed for vector<bool>
    }
    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;

void setupIO(const string &PROB = "") {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    if (PROB.length() != 0) {
        ifstream infile(PROB + ".in");
        if (infile.good()) {
            freopen((PROB + ".in").c_str(), "r", stdin);
            freopen((PROB + ".out").c_str(), "w", stdout);
        }
    }
}

/* ============================ */

bool solve(ll x) {
    if (x <= 4) {
        if (x == 1 || x == 4) return 0;
        return 1;
    }
    ll biggestPow2 = 1;
    while (biggestPow2 < x) biggestPow2 *= 2;
    if (x > biggestPow2/2) {
        return !solve(x - biggestPow2/2);
    } else {
        psD("shouldn't happen");
        exit(0);
    }
}

int main() {
    setupIO();

    int q; re(q);
    while (q--) {
        ll x, l, n; re(x, l, n);
        ll numTimes = (l+2*n-1)/(2*n);
        ll maxX = 1;
        F0R(i, numTimes + 1) {
            if (maxX > x) break;
            maxX *= 2;
        }
//        psD("maxX is", maxX);
        x %= maxX;
        if (x == 0) x = maxX;
        ll op1 = numTimes*2*n, op2 = numTimes*2*n+1;
//        psD("Options are", op1, op2);
        if (solve(x) == 0) {
            ps(op1);
        } else {
            ps(op2);
        }
    }

//    // Brute force pattern finding code
//    int asldkjflksdfj = 1;
//    while (true) {
////        ps("enter x, l, n:"); flush(cout);
//        int x, l, n;
////        re(x, l, n);
//        x = asldkjflksdfj++;
//        l = 1;
//        n = 5;
//        if (x == 1000) break;
//        if (x == -1) break;
//        int counter = x;
//        int iteration = 1;
//        vi s1, s2;
//        int s1b = 0;
//        s1.pb(s1b);
//        while (counter > 0) {
//            s2.pb(s1.back());
//            s1.pop_back();
//            if (s1.size() == 0) s1.pb(s1b);
//            s1b = !s1b;
//            F0R(i, sz(s1)) {
//                s1[i] = s1[i] ^ 1;
//            }
//            if (s2.back() > l) {
//                counter--;
////                if (counter == 0) ps("x = ", x, ". Final answer: ", s2.back());
//                if (counter == 0) pr((s2.back() & 1) == 1);
//            } else {
//                s2[sz(s2) - 1] += 2 * n;
//                s1.pb(s2[sz(s2) - 1]);
//                s1.pb(s2[sz(s2) - 1]);
//                if (!s2.empty()) s2.pop_back();
//                if (!s2.empty()) s2.pop_back();
//            }
////            psD("Iteration ", iteration++, ": s1 = ", s1, "; s2 = ", s2);
//        }
//    }

    return 0;
}

Compilation message (stderr)

cats.cpp: In function 'void setupIO(const string&)':
cats.cpp:151:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
             freopen((PROB + ".in").c_str(), "r", stdin);
             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cats.cpp:152:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
             freopen((PROB + ".out").c_str(), "w", stdout);
             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 4 / 4
• Subtask 4: 4 / 4
• Subtask 5: 4 / 4
• Subtask 6: 5 / 5