oj.uz

답안 #933008

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
933008 2024-02-24T19:32:22 Z velislavgarkov Construction of Highway (JOI18_construction) C++14
100 / 100
 1301 ms 27992 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <unordered_map>
using namespace std;
const int MAXN=1e5+10;
#define endl '\n'
int a[MAXN], b[MAXN], c[MAXN], d[MAXN];
int ss[MAXN], par[MAXN];
int heavy[MAXN], start[MAXN], op[MAXN], seg_pos[MAXN];
int heavy_cnt, cnt;
int tree[4*MAXN], lazy[4*MAXN];
int fen[MAXN];
unordered_map <int,int> um;
vector <int> v[MAXN];
vector <pair <int,long long> > arr;
int n;
void dfs(int x, int p) {
    ss[x]=0;
    for (auto i:v[x]) {
        if (i==p) continue;
        dfs(i,x);
        par[i]=x;
        ss[x]=max(ss[x],ss[i]+1);
    }
}
void decompose(int x, int curh) {
    seg_pos[x]=cnt;
    heavy[x]=curh;
    op[cnt]=x;
    cnt++;
    int maxind=-1;
    for (auto i:v[x]) {
        if (i==par[x]) continue;
        if (maxind==-1 || ss[maxind]<ss[i]) maxind=i;
    }
    if (maxind==-1) return;
    decompose(maxind,curh);
    for (auto i:v[x]) {
        if (i==par[x] || i==maxind) continue;
        heavy_cnt++;
        start[heavy_cnt]=i;
        decompose(i,heavy_cnt);
    }
}
int combine(int l, int r) {
    if (l==-2) return r;
    if (r==-2) return l;
    if (l==r) return l;
    return -1;
}
void push_lazy(int node, int l, int r) {
    if (!lazy[node]) return;
    if (l!=r) {
        lazy[node*2]=lazy[node*2+1]=lazy[node];
        tree[node*2]=tree[node*2+1]=lazy[node];
    }
    lazy[node]=0;
}
void update(int node, int l, int r, int ql, int qr, int ch) {
    if (ql>r || qr<l) return;
    push_lazy(node,l,r);
    if (l>=ql && r<=qr) {
        tree[node]=lazy[node]=ch;
        return;
    }
    int mid=(l+r)/2;
    update(node*2,l,mid,ql,qr,ch);
    update(node*2+1,mid+1,r,ql,qr,ch);
    tree[node]=combine(tree[node*2],tree[node*2+1]);
}
int query(int node, int l, int r, int ql, int qr) {
    if (ql>r || qr<l) return -2;
    push_lazy(node,l,r);
    if (l>=ql && r<=qr) return tree[node];
    int mid=(l+r)/2;
    return combine(query(node*2,l,mid,ql,qr),query(node*2+1,mid+1,r,ql,qr));
}
void add_edge(int x, int val) {
    while (x!=-1) {
        int nxt=start[heavy[x]];
        update(1,1,n,seg_pos[nxt],seg_pos[x],val);
        x=par[nxt];
    }
}
void update_fen(int ind, int ch) {
    while (ind<=n) {
        fen[ind]+=ch;
        ind+=(ind & (-ind));
    }
}
int query_fen(int ind) {
    int res=0;
    while (ind>0) {
        res+=fen[ind];
        ind-=(ind & (-ind));
    }
    return res;
}
int find_next(int l, int r, int val) {
    int cur=r;
    int mid;
    while (l<=r) {
        mid=(l+r)/2;
        if (query(1,1,n,mid,cur)==val) r=mid-1;
        else l=mid+1;
    }
    return op[r];
}
long long find_ans(int x) {
    if (!arr.empty()) arr.clear();
    int sa=-1;
    while (x!=-1) {
        int curv=query(1,1,n,seg_pos[x],seg_pos[x]);
        arr.push_back({curv,0});
        sa++;
        int nxt;
        while (x!=-1) {
            nxt=start[heavy[x]];
            int s=query(1,1,n,seg_pos[nxt],seg_pos[x]);
            if (s!=curv) break;
            arr[sa].second+=seg_pos[x]-seg_pos[nxt]+1;
            x=par[nxt];
        }
        if (x!=-1) {
            int newx=find_next(seg_pos[nxt],seg_pos[x],curv);
            arr[sa].second+=seg_pos[x]-seg_pos[newx];
            x=newx;
        }
    }
    long long ans=0;
    for (int i=arr.size()-1;i>=0;i--) {
        long long curs=query_fen(n)-query_fen(arr[i].first);
        curs*=arr[i].second;
        ans+=curs;
        update_fen(arr[i].first,arr[i].second);
    }
    for (int i=0;i<arr.size();i++) update_fen(arr[i].first,-arr[i].second);
    return ans;
}
int main () {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n;
    for (int i=1;i<=n;i++) {
        cin >> c[i];
        d[i]=c[i];
    }
    sort(d+1,d+n+1);
    for (int i=1;i<=n;i++) {
        if (um[d[i]]==0) um[d[i]]=i;
    }
    for (int i=1;i<=n;i++) c[i]=um[c[i]];
    for (int i=0;i<n-1;i++) {
        cin >> a[i] >> b[i];
        v[a[i]].push_back(b[i]);
        v[b[i]].push_back(a[i]);
    }
    dfs(1,-1);
    start[1]=1;
    heavy_cnt=cnt=1;
    par[1]=-1;
    decompose(1,1);
    update(1,1,n,1,1,1);
    for (int i=0;i<n-1;i++) {
        cout << find_ans(a[i]) << endl;
        add_edge(b[i],c[b[i]]);
    }
    return 0;
}

Compilation message

construction.cpp: In function 'long long int find_ans(int)':
construction.cpp:138:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  138 |     for (int i=0;i<arr.size();i++) update_fen(arr[i].first,-arr[i].second);
      |                  ~^~~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8796 KB Output is correct
2 Correct 2 ms 8796 KB Output is correct
3 Correct 2 ms 9048 KB Output is correct
4 Correct 2 ms 8796 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 3 ms 8796 KB Output is correct
7 Correct 3 ms 8900 KB Output is correct
8 Correct 2 ms 8796 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 2 ms 8804 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 2 ms 8796 KB Output is correct
15 Correct 3 ms 8796 KB Output is correct
16 Correct 3 ms 8796 KB Output is correct
17 Correct 3 ms 8796 KB Output is correct
18 Correct 3 ms 8796 KB Output is correct
19 Correct 2 ms 8796 KB Output is correct
20 Correct 2 ms 8796 KB Output is correct
21 Correct 2 ms 8796 KB Output is correct
22 Correct 2 ms 8796 KB Output is correct
23 Correct 3 ms 8840 KB Output is correct
24 Correct 5 ms 8840 KB Output is correct
25 Correct 3 ms 8796 KB Output is correct
26 Correct 2 ms 8796 KB Output is correct
27 Correct 3 ms 8796 KB Output is correct
28 Correct 2 ms 8796 KB Output is correct
29 Correct 2 ms 8792 KB Output is correct
30 Correct 4 ms 8796 KB Output is correct
31 Correct 3 ms 8796 KB Output is correct
32 Correct 2 ms 8836 KB Output is correct
33 Correct 2 ms 8796 KB Output is correct
34 Correct 2 ms 8796 KB Output is correct
35 Correct 2 ms 8796 KB Output is correct
36 Correct 2 ms 8796 KB Output is correct
37 Correct 2 ms 8796 KB Output is correct
38 Correct 2 ms 8796 KB Output is correct
39 Correct 2 ms 8796 KB Output is correct
40 Correct 2 ms 8796 KB Output is correct
41 Correct 2 ms 8836 KB Output is correct
42 Correct 2 ms 8792 KB Output is correct
43 Correct 2 ms 8796 KB Output is correct
44 Correct 2 ms 8796 KB Output is correct

Subtask #2
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8796 KB Output is correct
2 Correct 2 ms 8796 KB Output is correct
3 Correct 2 ms 9048 KB Output is correct
4 Correct 2 ms 8796 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 3 ms 8796 KB Output is correct
7 Correct 3 ms 8900 KB Output is correct
8 Correct 2 ms 8796 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 2 ms 8804 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 2 ms 8796 KB Output is correct
15 Correct 3 ms 8796 KB Output is correct
16 Correct 3 ms 8796 KB Output is correct
17 Correct 3 ms 8796 KB Output is correct
18 Correct 3 ms 8796 KB Output is correct
19 Correct 2 ms 8796 KB Output is correct
20 Correct 2 ms 8796 KB Output is correct
21 Correct 2 ms 8796 KB Output is correct
22 Correct 2 ms 8796 KB Output is correct
23 Correct 3 ms 8840 KB Output is correct
24 Correct 5 ms 8840 KB Output is correct
25 Correct 3 ms 8796 KB Output is correct
26 Correct 2 ms 8796 KB Output is correct
27 Correct 3 ms 8796 KB Output is correct
28 Correct 2 ms 8796 KB Output is correct
29 Correct 2 ms 8792 KB Output is correct
30 Correct 4 ms 8796 KB Output is correct
31 Correct 3 ms 8796 KB Output is correct
32 Correct 2 ms 8836 KB Output is correct
33 Correct 2 ms 8796 KB Output is correct
34 Correct 2 ms 8796 KB Output is correct
35 Correct 2 ms 8796 KB Output is correct
36 Correct 2 ms 8796 KB Output is correct
37 Correct 2 ms 8796 KB Output is correct
38 Correct 2 ms 8796 KB Output is correct
39 Correct 2 ms 8796 KB Output is correct
40 Correct 2 ms 8796 KB Output is correct
41 Correct 2 ms 8836 KB Output is correct
42 Correct 2 ms 8792 KB Output is correct
43 Correct 2 ms 8796 KB Output is correct
44 Correct 2 ms 8796 KB Output is correct
45 Correct 4 ms 8968 KB Output is correct
46 Correct 15 ms 9048 KB Output is correct
47 Correct 15 ms 9052 KB Output is correct
48 Correct 15 ms 9052 KB Output is correct
49 Correct 6 ms 9564 KB Output is correct
50 Correct 5 ms 9564 KB Output is correct
51 Correct 5 ms 9356 KB Output is correct
52 Correct 9 ms 9304 KB Output is correct
53 Correct 11 ms 9308 KB Output is correct
54 Correct 11 ms 9440 KB Output is correct
55 Correct 9 ms 9308 KB Output is correct
56 Correct 9 ms 9308 KB Output is correct
57 Correct 27 ms 9052 KB Output is correct
58 Correct 28 ms 9052 KB Output is correct
59 Correct 28 ms 9260 KB Output is correct
60 Correct 27 ms 9052 KB Output is correct
61 Correct 11 ms 9308 KB Output is correct
62 Correct 11 ms 9308 KB Output is correct
63 Correct 11 ms 9424 KB Output is correct
64 Correct 11 ms 9052 KB Output is correct
65 Correct 13 ms 9048 KB Output is correct
66 Correct 14 ms 9052 KB Output is correct
67 Correct 14 ms 9052 KB Output is correct
68 Correct 4 ms 9308 KB Output is correct
69 Correct 9 ms 9364 KB Output is correct
70 Correct 8 ms 9052 KB Output is correct
71 Correct 8 ms 9244 KB Output is correct
72 Correct 26 ms 9268 KB Output is correct
73 Correct 28 ms 9048 KB Output is correct
74 Correct 10 ms 9052 KB Output is correct
75 Correct 10 ms 9100 KB Output is correct
76 Correct 9 ms 9304 KB Output is correct
77 Correct 9 ms 9308 KB Output is correct
78 Correct 9 ms 9052 KB Output is correct
79 Correct 9 ms 9048 KB Output is correct
80 Correct 9 ms 9260 KB Output is correct
81 Correct 12 ms 9564 KB Output is correct
82 Correct 12 ms 9308 KB Output is correct
83 Correct 11 ms 9308 KB Output is correct
84 Correct 11 ms 9108 KB Output is correct
85 Correct 12 ms 9052 KB Output is correct
86 Correct 12 ms 9048 KB Output is correct

Subtask #3
84.0 / 84.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8796 KB Output is correct
2 Correct 2 ms 8796 KB Output is correct
3 Correct 2 ms 9048 KB Output is correct
4 Correct 2 ms 8796 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 3 ms 8796 KB Output is correct
7 Correct 3 ms 8900 KB Output is correct
8 Correct 2 ms 8796 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 2 ms 8804 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 2 ms 8796 KB Output is correct
15 Correct 3 ms 8796 KB Output is correct
16 Correct 3 ms 8796 KB Output is correct
17 Correct 3 ms 8796 KB Output is correct
18 Correct 3 ms 8796 KB Output is correct
19 Correct 2 ms 8796 KB Output is correct
20 Correct 2 ms 8796 KB Output is correct
21 Correct 2 ms 8796 KB Output is correct
22 Correct 2 ms 8796 KB Output is correct
23 Correct 3 ms 8840 KB Output is correct
24 Correct 5 ms 8840 KB Output is correct
25 Correct 3 ms 8796 KB Output is correct
26 Correct 2 ms 8796 KB Output is correct
27 Correct 3 ms 8796 KB Output is correct
28 Correct 2 ms 8796 KB Output is correct
29 Correct 2 ms 8792 KB Output is correct
30 Correct 4 ms 8796 KB Output is correct
31 Correct 3 ms 8796 KB Output is correct
32 Correct 2 ms 8836 KB Output is correct
33 Correct 2 ms 8796 KB Output is correct
34 Correct 2 ms 8796 KB Output is correct
35 Correct 2 ms 8796 KB Output is correct
36 Correct 2 ms 8796 KB Output is correct
37 Correct 2 ms 8796 KB Output is correct
38 Correct 2 ms 8796 KB Output is correct
39 Correct 2 ms 8796 KB Output is correct
40 Correct 2 ms 8796 KB Output is correct
41 Correct 2 ms 8836 KB Output is correct
42 Correct 2 ms 8792 KB Output is correct
43 Correct 2 ms 8796 KB Output is correct
44 Correct 2 ms 8796 KB Output is correct
45 Correct 4 ms 8968 KB Output is correct
46 Correct 15 ms 9048 KB Output is correct
47 Correct 15 ms 9052 KB Output is correct
48 Correct 15 ms 9052 KB Output is correct
49 Correct 6 ms 9564 KB Output is correct
50 Correct 5 ms 9564 KB Output is correct
51 Correct 5 ms 9356 KB Output is correct
52 Correct 9 ms 9304 KB Output is correct
53 Correct 11 ms 9308 KB Output is correct
54 Correct 11 ms 9440 KB Output is correct
55 Correct 9 ms 9308 KB Output is correct
56 Correct 9 ms 9308 KB Output is correct
57 Correct 27 ms 9052 KB Output is correct
58 Correct 28 ms 9052 KB Output is correct
59 Correct 28 ms 9260 KB Output is correct
60 Correct 27 ms 9052 KB Output is correct
61 Correct 11 ms 9308 KB Output is correct
62 Correct 11 ms 9308 KB Output is correct
63 Correct 11 ms 9424 KB Output is correct
64 Correct 11 ms 9052 KB Output is correct
65 Correct 13 ms 9048 KB Output is correct
66 Correct 14 ms 9052 KB Output is correct
67 Correct 14 ms 9052 KB Output is correct
68 Correct 4 ms 9308 KB Output is correct
69 Correct 9 ms 9364 KB Output is correct
70 Correct 8 ms 9052 KB Output is correct
71 Correct 8 ms 9244 KB Output is correct
72 Correct 26 ms 9268 KB Output is correct
73 Correct 28 ms 9048 KB Output is correct
74 Correct 10 ms 9052 KB Output is correct
75 Correct 10 ms 9100 KB Output is correct
76 Correct 9 ms 9304 KB Output is correct
77 Correct 9 ms 9308 KB Output is correct
78 Correct 9 ms 9052 KB Output is correct
79 Correct 9 ms 9048 KB Output is correct
80 Correct 9 ms 9260 KB Output is correct
81 Correct 12 ms 9564 KB Output is correct
82 Correct 12 ms 9308 KB Output is correct
83 Correct 11 ms 9308 KB Output is correct
84 Correct 11 ms 9108 KB Output is correct
85 Correct 12 ms 9052 KB Output is correct
86 Correct 12 ms 9048 KB Output is correct
87 Correct 54 ms 9820 KB Output is correct
88 Correct 155 ms 12128 KB Output is correct
89 Correct 649 ms 20172 KB Output is correct
90 Correct 622 ms 20460 KB Output is correct
91 Correct 618 ms 20196 KB Output is correct
92 Correct 116 ms 27992 KB Output is correct
93 Correct 121 ms 27916 KB Output is correct
94 Correct 115 ms 27988 KB Output is correct
95 Correct 296 ms 25276 KB Output is correct
96 Correct 306 ms 25744 KB Output is correct
97 Correct 310 ms 26116 KB Output is correct
98 Correct 300 ms 25800 KB Output is correct
99 Correct 337 ms 24404 KB Output is correct
100 Correct 1235 ms 20048 KB Output is correct
101 Correct 1258 ms 20124 KB Output is correct
102 Correct 1278 ms 20464 KB Output is correct
103 Correct 1301 ms 20248 KB Output is correct
104 Correct 401 ms 24000 KB Output is correct
105 Correct 419 ms 24176 KB Output is correct
106 Correct 401 ms 24004 KB Output is correct
107 Correct 427 ms 15172 KB Output is correct
108 Correct 621 ms 15656 KB Output is correct
109 Correct 653 ms 16660 KB Output is correct
110 Correct 101 ms 22868 KB Output is correct
111 Correct 303 ms 25544 KB Output is correct
112 Correct 287 ms 19916 KB Output is correct
113 Correct 291 ms 19092 KB Output is correct
114 Correct 1261 ms 20168 KB Output is correct
115 Correct 1275 ms 15296 KB Output is correct
116 Correct 378 ms 19024 KB Output is correct
117 Correct 332 ms 21748 KB Output is correct
118 Correct 320 ms 20964 KB Output is correct
119 Correct 328 ms 20680 KB Output is correct
120 Correct 309 ms 17056 KB Output is correct
121 Correct 313 ms 16488 KB Output is correct
122 Correct 306 ms 16140 KB Output is correct
123 Correct 464 ms 21696 KB Output is correct
124 Correct 450 ms 21040 KB Output is correct
125 Correct 456 ms 20808 KB Output is correct
126 Correct 445 ms 17176 KB Output is correct
127 Correct 452 ms 16420 KB Output is correct
128 Correct 443 ms 16304 KB Output is correct