제출 #612087

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
612087		HediChehaidar	고대 책들 (IOI17_books)	C++17	0 / 100	2 ms	468 KiB

books

#include<bits/stdc++.h>
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD)
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM)
#define ss second
#define ff first
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define vi vector<int>
#define vii vector<pair<int,int>>
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd  pair<double,double>
#define vdd  vector<pdd>
#define dte  tuple<double , double , double>
using namespace std;
const int INF = 1000*1000*1000; // 1 e 9
const int MOD = 1e9 + 7;//998244353 ;
const double EPS = 0.000000001; // 1 e -9
const ll inf = (ll)1e18;


int n ;
set<tuple<vi , int , int>> ss;
map<tuple<vi , int , int> , int> dist;
queue<tuple<vi , int , int>> q;
int d = 0;
ll solve(vi v , int pos , int hand){
    if(pos < n - 1){
        auto k = make_tuple(v , pos + 1 , hand);
        if(ss.find(k) == ss.end()){
            ss.insert(k) ; dist[k] = d + 1; q.push(k);
        }
    }
    if(pos > 0){
        auto k = make_tuple(v , pos - 1 , hand);
        if(ss.find(k) == ss.end()){
            ss.insert(k) ; dist[k] = d + 1; q.push(k);
        }
    }
}
ll minimum_walk(vi p , int s){
    n = p.size();
    if(n > 4) return 0;
    q.push(make_tuple(p , s , -1));
    ss.insert(make_tuple(p , s , -1));
    dist[make_tuple(p , s , -1)] = 0;
    while(!q.empty()){
        d = dist[q.front()];
        vi cur; int pos , hand; tie(cur , pos , hand) = q.front(); q.pop();
        solve(cur , pos , hand);
        swap(hand , cur[pos]);
        solve(cur , pos, hand);
    }
    vi ans; for(int i = 0 ; i < n ; i++) ans.pb(i);
    return dist[make_tuple(ans, s , -1)];
}

/*int main(){
    //ifstream fin ("testing.txt");
    //ofstream fout ("output.txt");
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int nn  , sa; cin>>nn>>sa;
    vi vv(nn); for(int i = 0 ; i < nn ; i++) cin>>vv[i];
    cout << minimum_walk(vv , sa);
    return 0;
}
*/
/*
    Think of : BS / DFS / BFS / SSSP / SCC / MSP / MAX FLOW / TOPSORT / LCA / MATRIX / DP(bitmask) / 2 POINTERS / SEG TREE / MATH / UN FIND / MO / HLD
    Read the statement CAREFULLY !!
    Make a GREADY APPROACH !!!! (start from highest / lowest)
    Make your own TESTS !!
    Be careful from CORNER CASES !
*/

컴파일 시 표준 에러 (stderr) 메시지

books.cpp: In function 'll solve(std::vector<int>, int, int)':
books.cpp:46:1: warning: no return statement in function returning non-void [-Wreturn-type]
   46 | }
      | ^

• Subtask 1: 0 / 12
• Subtask 2: 0 / 10
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 30