oj.uz

Submission #898353

# Submission time Handle Problem Language Result Execution time Memory
898353 2024-01-04T14:16:49 Z dong_gas Olympiads (BOI19_olympiads) C++17
100 / 100
 62 ms 1752 KB 
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2")
#include <bits/extc++.h>
#define all(v) v.begin(), v.end()
#define zip(v) sort(all(v)), v.erase(unique(all(v)), v.end())
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pint;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

struct state {
    int score;
    vector<int> selected, forced; //선택된 거, 강제된 거
    vector<bool> forbidden; //금지된 거
    bool can;
};

bool operator<(state x, state y) {return x.score<y.score;}

int n,k,c;
int a[500][6];

bool is_in(vector<int>& v, int x)  {
    for(int i:v) {
        if(i==x) return true;
    }
    return false;
}

state go(state bef) {
    state ret=bef;
    ret.selected=bef.forced;
    ret.can=true;
    //selected는 각각 순서대로 best점수 유지할 거임
    for(int i=ret.selected.size();i<k;i++) {
        //k개까지 선택할 거임.
        ret.selected.push_back(-1);
        for(int j=0;j<n;j++) {
            //금지된 것 아니고
            //이미 선택된 것 아니고
            if(ret.forbidden[j]) continue;
            if(is_in(ret.selected,j)) continue;

            //아직 선택 안 했거나
            //방금 추가한 학생보다 이벤트 점수 높으면 바꿀 거임.
            if(ret.selected[i]==-1 || a[j][i]>a[ret.selected[i]][i]) {
                ret.selected.pop_back(); ret.selected.push_back(j);
            }
        }        
    }
    vector<int> val(k,0);
    ret.score=0;
    for(int i=0;i<k;i++) {
        for(int j=0;j<k;j++) if(~ret.selected[i]) val[j]=max(val[j],a[ret.selected[i]][j]);
    }
    for(int i=0;i<k;i++) ret.score+=val[i];
    if(ret.selected.back()==-1) ret.can=false;
    return ret;
}

void solve() {
    cin>>n>>k>>c;
    c--;
    for(int i=0;i<n;i++) for(int j=0;j<k;j++) cin>>a[i][j];
    std::priority_queue<state> pq;
    pq.push(go({0,{},{},vector<bool>(n,false),1}));
    while(c--) {
        state now=pq.top(); pq.pop();      
        for(int i=now.forced.size();i<k;i++) {
            //selected[i]는 선택된 것 중 강제 안 된거..
            //강제 안 된거 하나씩 금지 시키면서 가야 함
            now.forbidden[now.selected[i]]=true;
            state nxt=go(now);
            if(nxt.can) pq.push(nxt);
            now.forbidden[now.selected[i]]=false;
            now.forced.push_back(now.selected[i]);
        }
    }
    cout<<pq.top().score;
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    int tc=1; //cin>>tc;
    while(tc--) solve();
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 348 KB Output is correct
2 Correct 10 ms 488 KB Output is correct
3 Correct 9 ms 348 KB Output is correct
4 Correct 6 ms 344 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 604 KB Output is correct
2 Correct 9 ms 436 KB Output is correct
3 Correct 16 ms 928 KB Output is correct
4 Correct 14 ms 820 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 348 KB Output is correct
2 Correct 8 ms 468 KB Output is correct
3 Correct 40 ms 1152 KB Output is correct
4 Correct 40 ms 1148 KB Output is correct
5 Correct 22 ms 604 KB Output is correct
6 Correct 11 ms 604 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 348 KB Output is correct
2 Correct 10 ms 488 KB Output is correct
3 Correct 9 ms 348 KB Output is correct
4 Correct 6 ms 344 KB Output is correct
5 Correct 13 ms 604 KB Output is correct
6 Correct 9 ms 436 KB Output is correct
7 Correct 16 ms 928 KB Output is correct
8 Correct 14 ms 820 KB Output is correct
9 Correct 11 ms 348 KB Output is correct
10 Correct 8 ms 468 KB Output is correct
11 Correct 40 ms 1152 KB Output is correct
12 Correct 40 ms 1148 KB Output is correct
13 Correct 22 ms 604 KB Output is correct
14 Correct 11 ms 604 KB Output is correct
15 Correct 19 ms 604 KB Output is correct
16 Correct 33 ms 1112 KB Output is correct
17 Correct 62 ms 1752 KB Output is correct
18 Correct 32 ms 856 KB Output is correct
19 Correct 8 ms 348 KB Output is correct