Submission #966500

#	Time	Username	Problem	Language	Result	Execution time	Memory
966500		Requiem	Vrtić (COCI18_vrtic)	C++17	32 / 160	2062 ms	197888 KiB

vrtic

#include<bits/stdc++.h>
#define int long long
#define pb push_back
#define fast ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
#define MOD 1000000007
#define INF 1e18
#define fi first
#define se second
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define FORD(i,a,b) for(int i=a;i>=b;i--)
#define sz(a) ((int)(a).size())
#define endl '\n'
#define pi 3.14159265359
#define TASKNAME "vrtic"
template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res >= val){ res = val; return true; }; return false; }
using namespace std;
typedef pair<int,int> ii;
typedef pair<int,ii> iii;
typedef vector<int> vi;
const int MAXN = 159;
int n;
int best_friend[MAXN], bag_of_candy[MAXN];

namespace subtask1{
    bool checkSubtask1(){
         for(int i = 1; i <= n; i++){
             if (best_friend[i] != i % n + 1) return false;
         }
         return true;
    }

    int arr[MAXN];

    void solveSubtask1(){
        int res = 0, splitting_point = 0;
        sort(bag_of_candy + 1, bag_of_candy + 1 + n);
        int cur = 0;

        for(int i = 3; i <= n; i++){
            maximize(res, abs(bag_of_candy[i] - bag_of_candy[i - 2]));
        }

        cout << res << endl;
        for(int i = 1; i <= n; i += 2){
            cout << bag_of_candy[i] << ' ';
        }
        for(int i = n - (n & 1); i > 0; i -= 2){
            cout << bag_of_candy[i] << ' ';
        }
        cout << endl;
    }

}
namespace subtask2{ //not usable yet
    bool checkSubtask2(){
        return n <= 20;
    }

    void solveSubtask2(){
        int permutation[21], answer[21];
        iota(permutation + 1, permutation + 1 + n, 1);
        int res = INF;
        do{
            int cur = 0;
            for(int i = 1; i <= n; i++){
                maximize(cur, abs( bag_of_candy[permutation[i]] - bag_of_candy[permutation[best_friend[i]]]  )   );
             }
            if (minimize(res, cur)){
                cout << "RES: " << res << endl;
                for(int i = 1; i <= n; i++){
                    answer[i] = permutation[i];
                    cout << bag_of_candy[permutation[i]] << ' ';
                }
                cout << endl;
            }
        }while(next_permutation(permutation + 1, permutation + 1 + n));
        cout << res << endl;
        for(int i = 1; i <= n; i++){
            cout << bag_of_candy[answer[i]] << ' ';
        }
        cout << endl;
    }
}
main()
{
    fast;
    if (fopen(TASKNAME".inp","r")){
        freopen(TASKNAME".inp","r",stdin);
        freopen(TASKNAME".out","w",stdout);
    }
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> best_friend[i];
    }

    for(int i = 1; i <= n; i++){
        cin >> bag_of_candy[i];
    }

    if (subtask1::checkSubtask1()) return subtask1::solveSubtask1(), 0;
    if (subtask2::checkSubtask2()) return subtask2::solveSubtask2(), 0;

}
/**
Warning:
- MLE / TLE?
- Gioi han mang?
- Gia tri max phai luon gan cho -INF
- long long co can thiet khong?
- tran mang.
- code can than hon
- Nho sinh test de tranh RTE / TLE
--> Coi lai truoc khi nop
**/

Compilation message (stderr)

vrtic.cpp: In function 'void subtask1::solveSubtask1()':
vrtic.cpp:36:22: warning: unused variable 'splitting_point' [-Wunused-variable]
   36 |         int res = 0, splitting_point = 0;
      |                      ^~~~~~~~~~~~~~~
vrtic.cpp:38:13: warning: unused variable 'cur' [-Wunused-variable]
   38 |         int cur = 0;
      |             ^~~
vrtic.cpp: At global scope:
vrtic.cpp:85:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   85 | main()
      | ^~~~
vrtic.cpp: In function 'int main()':
vrtic.cpp:89:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |         freopen(TASKNAME".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
vrtic.cpp:90:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |         freopen(TASKNAME".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 16 / 16
• Subtask 2: 16 / 16
• Subtask 3: 0 / 16
• Subtask 4: 0 / 16
• Subtask 5: 0 / 16
• Subtask 6: 0 / 16
• Subtask 7: 0 / 16
• Subtask 8: 0 / 16
• Subtask 9: 0 / 16
• Subtask 10: 0 / 16