Submission #938584

#	Time	Username	Problem	Language	Result	Execution time	Memory
938584		Zero_OP	Combo (IOI18_combo)	C++14	100 / 100	13 ms	1696 KiB

combo

#include<bits/stdc++.h>
#include<combo.h>

using namespace std;
using int64 = int64_t;

#define     REP(i, n) for(int i = 0, _n = n; i < _n; ++i)
#define    REPD(i, n) for(int i = n - 1; i >= 0; --i)
#define  FOR(i, l, r) for(int i = l, _r = r; i <= _r; ++i)
#define FORD(i, r, l) for(int i = r, _l = l; i >= _l; --i)
#define          left __left
#define         right __right
#define          prev __prev
#define          next __next
#define           div __div
#define            pb push_back
#define            pf push_front
#define         sz(v) (int)v.size()
#define      range(v) begin(v), end(v)
#define    compact(v) v.erase(unique(range(v)), end(v))
#define      debug(v) "[" #v " = " << (v) << "]"

template<typename T>
    bool minimize(T& a, const T& b){
        if(a > b){
            a = b;
            return true;
        }
        return false;
    }

template<typename T>
    bool maximize(T& a, const T& b){
        if(a < b){
            a = b;
            return true;
        }
        return false;
    }

template<int dimension, class T>
struct vec : public vector<vec<dimension - 1, T>> {
    static_assert(dimension > 0, "Dimension must be positive !\n");
    template<typename... Args>
    vec(int n = 0, Args... args) : vector<vec<dimension - 1, T>>(n, vec<dimension - 1, T>(args...)) {}
};

template<class T>
struct vec<1, T> : public vector<T> {
    vec(int n = 0, T val = T()) : vector<T>(n, val) {}
};

string guess_sequence(int N){
    string s = "", p = "";
    p = "AB";
    if(press(p)){
        p = "A";
        if(press(p)){
            s += "A";
        }
        else{
            s += "B";
        }
    }
    else{
        p = "X";
        if(press(p)){
            s += "X";
        }
        else{
            s += "Y";
        }
    }

    if(N == 1) return s;

    string available = "";
    if(s != "A") available += "A";
    if(s != "B") available += "B";
    if(s != "X") available += "X";
    if(s != "Y") available += "Y";

    FOR(i, 2, N - 1){
        string tmp = s + available[0] + available[0] + s + available[0] + available[1] + s + available[0] + available[2] + s + available[1];
        int corrected = press(tmp);
        if(corrected == i + 1) s += available[0];
        else if(corrected == i) s += available[1];
        else s += available[2];
    }

    if(press(s + available[0]) == N) s += available[0];
    else if(press(s + available[1]) == N) s += available[1];
    else s += available[2];

    return s;
}

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95