Submission #773170

#	Time	Username	Problem	Language	Result	Execution time	Memory
773170		GrindMachine	Olympiads (BOI19_olympiads)	C++17	100 / 100	22 ms	1268 KiB

olympiads

// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*

refs:
edi => https://boi2019.eio.ee/wp-content/uploads/2019/05/olymp.sol_.en_.pdf
fracturing search => https://usaco.guide/adv/fracturing-search?lang=cpp

*/

const int MOD = 1e9 + 7;
const int N = 500 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;
const int K = 6;

int n,k,c;
int a[N][K];

int get_val(vector<int> team){
    rep(j,k){
        if(team[j] == -1){
            return 0;
        }
    }

    int res = 0;

    rep(j,k){
        int mx = 0;
        trav(i,team){
            amax(mx,a[i][j]);
        }
        res += mx;
    }

    return res;
}

vector<bool> there(N);

struct item {
    vector<int> team;
    vector<bool> banned;
    int cost = 0;
    int fix = -1;

    void calc(){
        trav(i,team){
            if(i != -1){
                there[i] = 1;
            }
        }

        rep(j,k){
            if(team[j] != -1) conts;
            int mx = -1, ind = -1;
            rep(i,n){
                if(banned[i] or there[i]) conts;
                if(a[i][j] > mx){
                    mx = a[i][j];
                    ind = i;
                }
            }

            if(ind == -1) break;

            team[j] = ind;
            there[ind] = 1;
        }

        cost = get_val(team);

        trav(i,team){
            if(i != -1){
                there[i] = 0;
            }
        }
    }

    item(){
        team = vector<int>(k,-1);
        banned = vector<bool>(n);
        calc();
    }

    item(vector<int> team_, vector<bool> banned_, int fix_){
        team = team_;
        banned = banned_;
        fix = fix_;
        calc();
    }
};

bool operator<(const item &x, const item &y){
    return x.cost < y.cost;
}

void solve(int test_case)
{
    cin >> n >> k >> c;
    rep(i,n) rep(j,k) cin >> a[i][j];

    priority_queue<item> pq;
    pq.push(item());

    rep1(id,c){
        if(pq.empty()){
            debug(id);
            break;
        }

        auto curr = pq.top();
        pq.pop();

        if(id == c){
            cout << curr.cost << endl;
            return;
        }

        // debug(curr.team);
        // debug(curr.cost);

        rep(i,k){
            if(curr.team[i] == -1){
                return;
            }
        }

        rep(i,k){
            if(i <= curr.fix) conts;
            auto team = curr.team;
            auto banned = curr.banned;
            int fix = i-1;

            banned[team[i]] = 1;
            team[i] = -1;

            for(int j = i+1; j < k; ++j){
                team[j] = -1;
            }

            pq.push(item(team,banned,fix));
        }
    }
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Compilation message (stderr)

olympiads.cpp: In function 'void solve(int)':
olympiads.cpp:48:18: warning: statement has no effect [-Wunused-value]
   48 | #define debug(x) 42
      |                  ^~
olympiads.cpp:157:13: note: in expansion of macro 'debug'
  157 |             debug(id);
      |             ^~~~~

• Subtask 1: 13 / 13
• Subtask 2: 31 / 31
• Subtask 3: 24 / 24
• Subtask 4: 32 / 32