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답안 #513223

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
513223 2022-01-17T04:17:27 Z wiwiho 별자리 3 (JOI20_constellation3) C++14
35 / 100
 491 ms 524292 KB 
#include <bits/stdc++.h>

#define mp make_pair
#define F first
#define S second
#define iter(a) a.begin(), a.end()
#define lsort(a) sort(iter(a))
#define gsort(a) sort(iter(a), greater<>())
#define eb emplace_back
#define printv(a, b) { \
    for(auto pv : a) b << pv << " "; \
    b << "\n"; \
}

using namespace std;

typedef long long ll;

using pii = pair<int, int>;

struct seg{
    int l, r, id;
    bool operator<(seg b) const {
        return l < b.l;
    }
};

ostream& operator<<(ostream& o, seg s){
    return o << '(' << s.l << ',' << s.r << ',' << s.id << ')';
}

vector<vector<int>> g, star;
vector<int> lp, rp;
vector<int> a, X, Y;
vector<ll> C;

vector<vector<ll>> dp;
vector<ll> sub;
int n;

void dfs(int now){
    ll total = 0;
    for(int i : star[now]) total += C[i];
    sub[now] = total;

    ll sum = 0;
    
    for(int i : g[now]){
        dfs(i);
    }

    vector<ll> tmp(n + 1);
    for(int i = 0; i <= n; i++){
        for(int j : g[now]) tmp[i] += dp[j][i];
    }

    ll cn = total + tmp[0];
    for(int i : star[now]){
        int x = X[i];
        cn = min(cn, tmp[x] + total - C[i]);
    }
    for(int i = 0; i <= n; i++){
        if(lp[now] <= i && i <= rp[now]) dp[now][i] = total + tmp[i];
        else dp[now][i] = cn;
    }
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    cin >> n;

    vector<pii> e;

    a.resize(n + 1);
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        e.eb(mp(a[i], i));
    }

    int m;
    cin >> m;
    X.resize(m + 1);
    Y.resize(m + 1);
    C.resize(m + 1);
    for(int i = 1; i <= m; i++){
        cin >> X[i] >> Y[i] >> C[i];
        e.eb(mp(Y[i], -i));
    }

    gsort(e);

    set<seg> st;
    st.insert(seg({1, n, 1}));
    int ts = 1;
    g.resize(2);
    star.resize(2);
    lp.resize(2);
    rp.resize(2);
    lp[1] = 1;
    rp[1] = n;

    for(int i = 0; i < e.size(); ){
        
        int y = e[i].F;

        for(; i < e.size() && e[i].F == y; i++){

            if(e[i].S > 0){
                int pos = e[i].S;
                
                auto it = st.upper_bound(seg({pos, 0, 0}));
                if(it == st.begin()) continue;
                it--;
                if(it->r < pos) continue;

                int l = it->l, r = it->r;
                int id = it->id;
                st.erase(it);
                if(l < pos){
                    st.insert(seg({l, pos - 1, ++ts}));
                    g.eb(); star.eb(); lp.eb(); rp.eb();
                    g[id].eb(ts);
                    lp[ts] = l;
                    rp[ts] = pos - 1;
                }
                if(pos < r){
                    st.insert(seg({pos + 1, r, ++ts}));
                    g.eb(); star.eb(); lp.eb(); rp.eb();
                    g[id].eb(ts);
                    lp[ts] = pos + 1;
                    rp[ts] = r;
                }
                //cerr << "split\n";
                //printv(st, cerr);
                continue;
            }

            int id = -e[i].S;
            //cerr << "add star " << id << "\n";
            //printv(st, cerr);
            int x = X[id];
            auto it = st.upper_bound(seg({x, 0, 0}));
            it--;

            int v = it->id;
            star[v].eb(id);
        }

    }

    /*for(int i = 1; i <= ts; i++){
        cerr << "seg " << i << " " << lp[i] << "  ";
        printv(star[i], cerr);
        printv(g[i], cerr);
    }*/

    dp.resize(ts + 1, vector<ll>(n + 1));
    sub.resize(ts + 1);
    dfs(1);

    cout << dp[1][0] << "\n";
    
    return 0;
}

Compilation message

constellation3.cpp: In function 'void dfs(int)':
constellation3.cpp:46:8: warning: unused variable 'sum' [-Wunused-variable]
   46 |     ll sum = 0;
      |        ^~~
constellation3.cpp: In function 'int main()':
constellation3.cpp:104:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |     for(int i = 0; i < e.size(); ){
      |                    ~~^~~~~~~~~~
constellation3.cpp:108:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |         for(; i < e.size() && e[i].F == y; i++){
      |               ~~^~~~~~~~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 972 KB Output is correct
2 Correct 1 ms 972 KB Output is correct
3 Correct 1 ms 972 KB Output is correct
4 Correct 1 ms 1024 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct
7 Correct 1 ms 844 KB Output is correct
8 Correct 1 ms 972 KB Output is correct
9 Correct 1 ms 972 KB Output is correct
10 Correct 1 ms 972 KB Output is correct
11 Correct 1 ms 972 KB Output is correct
12 Correct 1 ms 972 KB Output is correct
13 Correct 1 ms 972 KB Output is correct
14 Correct 1 ms 972 KB Output is correct
15 Correct 1 ms 972 KB Output is correct
16 Correct 1 ms 1100 KB Output is correct
17 Correct 1 ms 972 KB Output is correct
18 Correct 1 ms 972 KB Output is correct
19 Correct 1 ms 972 KB Output is correct
20 Correct 1 ms 844 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 972 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 972 KB Output is correct
2 Correct 1 ms 972 KB Output is correct
3 Correct 1 ms 972 KB Output is correct
4 Correct 1 ms 1024 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct
7 Correct 1 ms 844 KB Output is correct
8 Correct 1 ms 972 KB Output is correct
9 Correct 1 ms 972 KB Output is correct
10 Correct 1 ms 972 KB Output is correct
11 Correct 1 ms 972 KB Output is correct
12 Correct 1 ms 972 KB Output is correct
13 Correct 1 ms 972 KB Output is correct
14 Correct 1 ms 972 KB Output is correct
15 Correct 1 ms 972 KB Output is correct
16 Correct 1 ms 1100 KB Output is correct
17 Correct 1 ms 972 KB Output is correct
18 Correct 1 ms 972 KB Output is correct
19 Correct 1 ms 972 KB Output is correct
20 Correct 1 ms 844 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 972 KB Output is correct
23 Correct 25 ms 28908 KB Output is correct
24 Correct 30 ms 29260 KB Output is correct
25 Correct 25 ms 29116 KB Output is correct
26 Correct 26 ms 31216 KB Output is correct
27 Correct 24 ms 29508 KB Output is correct
28 Correct 28 ms 28912 KB Output is correct
29 Correct 26 ms 30180 KB Output is correct
30 Correct 26 ms 31828 KB Output is correct
31 Correct 27 ms 29524 KB Output is correct
32 Correct 26 ms 29840 KB Output is correct
33 Correct 27 ms 32020 KB Output is correct
34 Correct 26 ms 30668 KB Output is correct
35 Correct 26 ms 31500 KB Output is correct
36 Correct 27 ms 31712 KB Output is correct
37 Correct 33 ms 32052 KB Output is correct
38 Correct 25 ms 32152 KB Output is correct
39 Correct 25 ms 31180 KB Output is correct
40 Correct 25 ms 29436 KB Output is correct
41 Correct 25 ms 30824 KB Output is correct
42 Correct 28 ms 31508 KB Output is correct
43 Correct 23 ms 29260 KB Output is correct
44 Correct 29 ms 30284 KB Output is correct

Subtask #3
0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 972 KB Output is correct
2 Correct 1 ms 972 KB Output is correct
3 Correct 1 ms 972 KB Output is correct
4 Correct 1 ms 1024 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct
7 Correct 1 ms 844 KB Output is correct
8 Correct 1 ms 972 KB Output is correct
9 Correct 1 ms 972 KB Output is correct
10 Correct 1 ms 972 KB Output is correct
11 Correct 1 ms 972 KB Output is correct
12 Correct 1 ms 972 KB Output is correct
13 Correct 1 ms 972 KB Output is correct
14 Correct 1 ms 972 KB Output is correct
15 Correct 1 ms 972 KB Output is correct
16 Correct 1 ms 1100 KB Output is correct
17 Correct 1 ms 972 KB Output is correct
18 Correct 1 ms 972 KB Output is correct
19 Correct 1 ms 972 KB Output is correct
20 Correct 1 ms 844 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 972 KB Output is correct
23 Correct 25 ms 28908 KB Output is correct
24 Correct 30 ms 29260 KB Output is correct
25 Correct 25 ms 29116 KB Output is correct
26 Correct 26 ms 31216 KB Output is correct
27 Correct 24 ms 29508 KB Output is correct
28 Correct 28 ms 28912 KB Output is correct
29 Correct 26 ms 30180 KB Output is correct
30 Correct 26 ms 31828 KB Output is correct
31 Correct 27 ms 29524 KB Output is correct
32 Correct 26 ms 29840 KB Output is correct
33 Correct 27 ms 32020 KB Output is correct
34 Correct 26 ms 30668 KB Output is correct
35 Correct 26 ms 31500 KB Output is correct
36 Correct 27 ms 31712 KB Output is correct
37 Correct 33 ms 32052 KB Output is correct
38 Correct 25 ms 32152 KB Output is correct
39 Correct 25 ms 31180 KB Output is correct
40 Correct 25 ms 29436 KB Output is correct
41 Correct 25 ms 30824 KB Output is correct
42 Correct 28 ms 31508 KB Output is correct
43 Correct 23 ms 29260 KB Output is correct
44 Correct 29 ms 30284 KB Output is correct
45 Runtime error 491 ms 524292 KB Execution killed with signal 9
46 Halted 0 ms 0 KB -