Submission #257587

#	Time	Username	Problem	Language	Result	Execution time	Memory
257587		doowey	Question (Grader is different from the original contest) (CEOI14_question_grader)	C++14	100 / 100	3894 ms	48320 KiB

encoder

#include <bits/stdc++.h>

using namespace std;

const int N = 940;
int mask[N];
int cnt = 0;

void gen(){
    cnt = 0;
    for(int i = 0 ; i < (1 << 12); i ++ ){
        if(__builtin_popcount(i) == 6){
            mask[++cnt]=i;
        }
    }
}

int encode (int n, int x, int y) {
    if(mask[1] == 0)
        gen();
    for(int i = 0 ; i < 12; i ++ ){
        if((mask[x] & (1 << i)) && !(mask[y] & (1 << i))){
            return i + 1;
        }
    }
    return -1;
}

decoder

#include <bits/stdc++.h>

using namespace std;

const int NN = 940;
int mi[NN];
int cc;

void gen0(){
    cc = 0;
    for(int i = 0; i < (1 << 12); i ++ ){
        if(__builtin_popcount(i) == 6){
            mi[++cc]=i;
        }
    }
}

int decode (int n, int q, int h) {
    if(mi[1] == 0){
        gen0();
    }
    h--;
    int msk = mi[q];
    if((msk & (1 << h))) return true;
    else return false;
}

• Subtask 1: 100 / 100