Submission #149973

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
149973	2019-09-01T07:29:12 Z	코딩은 체육과목입니다(#3561, jwvg0425, 16silver, jhuni)	On the Grid (FXCUP4_grid)	C++17	Compilation error	0 ms	0 KB

grid

#include "grid.h"
#include <random>

using namespace std;

int n;

vector<int> ans;
vector<int> idx;


int get_max_disk(int x) {
    vector<int> v;
    std::random_device rd;
    std::mt19937 g(rd());
    vector<bool> vis(n, true);

    for(int i=0;i<n;i++){
        if (!ans[i]){
            v.push_back(i);
        } else {
            vis[i] = false;
        }
    }
    int p = x;
    int cnt = 0;
    while(p){
        cnt++;
        p>>=1;
    }
    for(int i=0;i<cnt;i++){
        shuffle(v.begin(), v.end(), g);
        vector<int> t = v;
        for(int j=x+1; j<=n; j++){
            t.push_back(idx[j]);
        }
        int r = PutDisks(t);
        r -= (n-x);
        r -= x - 1;
        for(int j=0;j<x-r;j++){
            vis[v[j]] = false;
        }
    }

    for(int i=0;i<n;i++){
        if (vis[i]){
            vector<int> v;
            v.push_back(i);
            for(int j=0;j<n;j++){
                if (!ans[j] && j != i){
                    v.push_back(j);
                }
            }
            for(int j=x+1;j<=n;j++){
                v.push_back(idx[j]);
            }
            int r = PutDisks(v);
            if (r - (n-x) == 2*x-1) {
                return i;
            }
        }
    }



    return -1;
}


std::vector<int> SortDisks(int N) {
    n = N;
    ans.resize(n);
    idx.resize(n+1);

    for(int i=n;i>=1;i--){
        int x = get_max_disk(i);
        ans[x] = i;
        idx[i] = x;
    }
	return ans;
}

Compilation message

grid.cpp: In function 'int get_max_disk(int)':
grid.cpp:32:9: error: 'shuffle' was not declared in this scope
         shuffle(v.begin(), v.end(), g);
         ^~~~~~~