oj.uz

답안 #242335

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
242335 2020-06-27T08:57:49 Z dwsc Magic Tree (CEOI19_magictree) C++14
37 / 100
 303 ms 430056 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
typedef pair<int,int> ii;
int n,m,k;
vector<int> adj[100010];
int ripe[100010];
int weight[100010];
int memo[100010][1010];
int dp(int u,int j){
    if (j == 0) return 0;
    if (memo[u][j] != -1) return memo[u][j];
    int s = 0;
    for (int i = 0; i < adj[u].size(); i++){
        int v = adj[u][i];
        s += dp(v,j);
    }
    if (j == ripe[u]) s += weight[u];
    if (weight[u] != 0)return memo[u][j] = max(s,dp(u,j-1));
    else return memo[u][j] = s;
}
struct node{
    int s,e,m,v;
    node *l,*r;
    node (int _s,int _e){
        s = _s;
        e = _e;
        m = (s+e)/2;
        v = 0;
        if (s != e){
            l = new node(s,m);
            r = new node(m+1,e);
        }
    }
    void up(int x,int v1){
        if (s == e) {v = v1;return;}
        if (x <= m) l->up(x,v1);
        else r->up(x,v1);
        v = max(l->v,r->v);
    }
    int rmq(int x,int y){
        if (s == x && e == y) return v;
        if (y <= m) return l->rmq(x,y);
        if (x > m) return r->rmq(x,y);
        return max(l->rmq(x,m),r->rmq(m+1,y));
    }
}*root;
main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> m >> k;
    int isline = 1;
    for (int i = 2; i <= n; i++){
        int p;
        cin >> p;
        if (i-1 != p) isline = 0;
        adj[p].push_back(i);
    }
    vector<int> temp;
    temp.push_back(0);
    for (int i = 0; i < m; i++){
        int v,d,w;
        cin >> v >> d >> w;
        ripe[v] = d;
        weight[v] = w;
        temp.push_back(d);
    }
    sort(temp.begin(),temp.end());
    temp.erase(unique(temp.begin(),temp.end()),temp.end());
    for (int i = 1; i <= n; i++) ripe[i] = lower_bound(temp.begin(),temp.end(),ripe[i])-temp.begin();
    //for (int i = 1; i <= n; i++) cout << ripe[i] << "\n";
    if (k <= 20){
    for (int i = 1; i<= n; i++){
        for (int j = 0; j < temp.size(); j++){
            memo[i][j] = -1;
        }
    }
    cout << dp(1,temp.size()-1);
    }
    else if (isline){
        int ans = 0;
        root = new node(0,temp.size()-1);
        for (int i = 1; i <= n; i++){
            if (!weight[i]) continue;
            int q = root->rmq(0,ripe[i]);
            ans = max(ans,q+weight[i]);
            root->up(ripe[i],q+1);
        }
        cout << ans;
    }
    else{
        int ans = 0;
        for (int i = 1; i <= n; i++) ans += weight[i];
        cout << ans;
    }
}

Compilation message

magictree.cpp: In function 'long long int dp(long long int, long long int)':
magictree.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < adj[u].size(); i++){
                     ~~^~~~~~~~~~~~~~~
magictree.cpp: At global scope:
magictree.cpp:48:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
magictree.cpp: In function 'int main()':
magictree.cpp:74:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = 0; j < temp.size(); j++){
                         ~~^~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 2688 KB Output is correct
2 Correct 6 ms 2816 KB Output is correct
3 Correct 6 ms 2816 KB Output is correct
4 Correct 6 ms 2816 KB Output is correct
5 Correct 6 ms 2688 KB Output is correct
6 Correct 7 ms 2816 KB Output is correct
7 Correct 6 ms 2816 KB Output is correct
8 Correct 6 ms 2816 KB Output is correct
9 Correct 6 ms 2944 KB Output is correct

Subtask #2
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 6264 KB Output is correct
2 Correct 39 ms 6524 KB Output is correct
3 Correct 73 ms 6380 KB Output is correct
4 Correct 66 ms 6640 KB Output is correct
5 Correct 71 ms 6476 KB Output is correct

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 2816 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 247 ms 410096 KB Output is correct
2 Correct 254 ms 408560 KB Output is correct
3 Correct 232 ms 412656 KB Output is correct
4 Correct 222 ms 408944 KB Output is correct
5 Correct 237 ms 415980 KB Output is correct

Subtask #5
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 2688 KB Output is correct
2 Correct 6 ms 2816 KB Output is correct
3 Correct 6 ms 2816 KB Output is correct
4 Correct 6 ms 2816 KB Output is correct
5 Correct 6 ms 2688 KB Output is correct
6 Correct 7 ms 2816 KB Output is correct
7 Correct 6 ms 2816 KB Output is correct
8 Correct 6 ms 2816 KB Output is correct
9 Correct 6 ms 2944 KB Output is correct
10 Correct 303 ms 424236 KB Output is correct
11 Correct 259 ms 416364 KB Output is correct
12 Correct 272 ms 426728 KB Output is correct
13 Correct 270 ms 423020 KB Output is correct
14 Correct 262 ms 430056 KB Output is correct

Subtask #6
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 10 ms 3456 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 2688 KB Output is correct
2 Correct 6 ms 2816 KB Output is correct
3 Correct 6 ms 2816 KB Output is correct
4 Correct 6 ms 2816 KB Output is correct
5 Correct 6 ms 2688 KB Output is correct
6 Correct 7 ms 2816 KB Output is correct
7 Correct 6 ms 2816 KB Output is correct
8 Correct 6 ms 2816 KB Output is correct
9 Correct 6 ms 2944 KB Output is correct
10 Incorrect 6 ms 2816 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #8
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 2688 KB Output is correct
2 Correct 6 ms 2816 KB Output is correct
3 Correct 6 ms 2816 KB Output is correct
4 Correct 6 ms 2816 KB Output is correct
5 Correct 6 ms 2688 KB Output is correct
6 Correct 7 ms 2816 KB Output is correct
7 Correct 6 ms 2816 KB Output is correct
8 Correct 6 ms 2816 KB Output is correct
9 Correct 6 ms 2944 KB Output is correct
10 Correct 40 ms 6264 KB Output is correct
11 Correct 39 ms 6524 KB Output is correct
12 Correct 73 ms 6380 KB Output is correct
13 Correct 66 ms 6640 KB Output is correct
14 Correct 71 ms 6476 KB Output is correct
15 Incorrect 6 ms 2816 KB Output isn't correct
16 Halted 0 ms 0 KB -