oj.uz

답안 #787304

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
787304 2023-07-19T04:24:39 Z 79brue Paths (RMI21_paths) C++17
100 / 100
 474 ms 62636 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

struct segTree{
    int cnt[800002]; ll sum[800002];

    inline void update(int i, int l, int r, int x, int v1, ll v2){
        if(l==r){
            cnt[i] += v1, sum[i] += v2;
            return;
        }
        int m = (l+r)>>1;
        if(x<=m) update(i*2, l, m, x, v1, v2);
        else update(i*2+1, m+1, r, x, v1, v2);
        cnt[i] = cnt[i*2] + cnt[i*2+1], sum[i] = sum[i*2] + sum[i*2+1];
    }

    inline ll query(int i, int l, int r, int x){
        if(l==r) return cnt[i] ? (sum[i] / cnt[i]) * x : 0;
        int m = (l+r)>>1;
        if(cnt[i*2+1] >= x) return query(i*2+1, m+1, r, x);
        else return query(i*2, l, m, x-cnt[i*2+1]) + sum[i*2+1];
    }
} tree;

struct Edge{
    int s, e; ll v; int idx;
    Edge(){}
    Edge(int s, int e, ll v): s(s), e(e), v(v){}
    bool operator<(const Edge &r)const{
        return idx<r.idx;
    }
};

int n, k;
Edge arr[200002];
vector<Edge> link[100002];
int in[100002], out[100002], idx[100002], inCnt;
int par[100002];

void dfs_in(int x, int p=-1){
    in[x] = ++inCnt;
    idx[inCnt] = x;
    par[x] = p;
    for(auto y: link[x]){
        if(y.e == p) continue;
        dfs_in(y.e, x);
    }
    out[x] = inCnt;
}

vector<Edge> linkSet[100002];
ll MX[200002], where[200002]; /// 이 간선 방향으로 갔을 때 최대가 몇인가
vector<pair<ll, ll> > options[100002]; /// 이 정점에서 나갈 수 있는 모든 옵션

pair<ll, int> dfs_getValues(int x, int p=-1){
//    printf("Get value %d %d\n", x, p);
    if(!linkSet[x].empty()){
        vector<Edge> tlst;
        for(Edge y: linkSet[x]){
            if((y.idx ^ p) == 1){
                tlst.push_back(y);
                continue;
            }
            options[x].push_back(make_pair(MX[y.idx] = (dfs_getValues(y.e, y.idx).first + y.v), y.idx));
        }
        linkSet[x].swap(tlst);
        sort(options[x].begin(), options[x].end());
        options[x].erase(unique(options[x].begin(), options[x].end()), options[x].end());
        reverse(options[x].begin(), options[x].end());
    }
    if(options[x].empty()) return make_pair(0, -1);
    else if((options[x][0].second ^ p) != 1) return options[x][0];
    else if((int)options[x].size() == 1) return make_pair(0, -1);
    else return options[x][1];
}

ll numbers[200002];
vector<ll> inQuery[100002], outQuery[100002];
ll ans[100002];

void putQuery(int s, int e, ll p, int mode){
    if(in[s] < in[e]){
        if(mode == 1){
            inQuery[1].push_back(p), outQuery[in[e]].push_back(p);
            if(out[e]+1 <= n+1) inQuery[out[e]+1].push_back(p), outQuery[n+1].push_back(p);
        }
        else{
            outQuery[1].push_back(p), inQuery[in[e]].push_back(p);
            if(out[e]+1 <= n+1) outQuery[out[e]+1].push_back(p), inQuery[n+1].push_back(p);
        }
    }
    else{
        if(mode == 1) inQuery[in[s]].push_back(p), outQuery[out[s]+1].push_back(p);
        else          outQuery[in[s]].push_back(p), inQuery[out[s]+1].push_back(p);
    }
}

int main(){
    scanf("%d %d", &n, &k);
    for(int i=1; i<n; i++){
        scanf("%d %d %lld", &arr[i*2-2].s, &arr[i*2-2].e, &arr[i*2-2].v);
        arr[i*2-1].s = arr[i*2-2].e, arr[i*2-1].e = arr[i*2-2].s, arr[i*2-1].v = arr[i*2-2].v;
        arr[i*2-2].idx = i*2-2, arr[i*2-1].idx = i*2-1;
        link[arr[i*2-2].s].push_back(arr[i*2-2]);
        link[arr[i*2-1].s].push_back(arr[i*2-1]);
    }
    for(int i=1; i<=n; i++) linkSet[i] = link[i];

    dfs_in(1);
    for(int i=0; i<(n-1)*2; i++){
        if(MX[i]) continue;
        pair<ll, int> p = dfs_getValues(arr[i].e, i);
        MX[i] = p.first + arr[i].v;
        where[i] = p.second;
    }
    for(int i=1; i<=n; i++) options[i].clear();
    for(int i=0; i<(n-1)*2; i++){
        options[arr[i].s].push_back(make_pair(MX[i], i));
    }
    for(int i=1; i<=n; i++) sort(options[i].rbegin(), options[i].rend());

    for(int i=1; i<=n; i++){
        /// 수는 최대 2N개
        for(int j=0; j<(int)options[i].size(); j++){
            int p = options[i][j].second; ll v = options[i][j].first;
            int s = arr[p].s, e = arr[p].e;
            putQuery(s, e, v, 1);
            if(where[p] != -1) putQuery(s, e, v-arr[p].v, -1);
        }
    }

    numbers[0] = 0;
    for(int i=0; i<(n-1)*2; i++) numbers[i+1] = MX[i];
    sort(numbers, numbers+n*2-1);
    int L = unique(numbers, numbers+n*2-1) - numbers;
    for(int i=1; i<=n; i++) for(ll &p: inQuery[i]) p = lower_bound(numbers, numbers+L, p) - numbers;
    for(int i=1; i<=n; i++) for(ll &p: outQuery[i]) p = lower_bound(numbers, numbers+L, p) - numbers;

    for(int i=1; i<=n; i++){
        for(ll p: inQuery[i]){
//            printf("In update %d %lld\n", i, numbers[p]);
            tree.update(1, 0, L-1, p, 1, numbers[p]);
        }
        for(ll p: outQuery[i]){
//            printf("Out update %d %lld\n", i, numbers[p]);
            tree.update(1, 0, L-1, p, -1, -numbers[p]);
        }
        ans[idx[i]] = tree.query(1, 0, L-1, k);
    }

    for(int i=1; i<=n; i++){
        printf("%lld\n", ans[i]);
    }
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:103:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  103 |     scanf("%d %d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~
Main.cpp:105:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |         scanf("%d %d %lld", &arr[i*2-2].s, &arr[i*2-2].e, &arr[i*2-2].v);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 12072 KB Output is correct
2 Correct 6 ms 12116 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 12072 KB Output is correct
2 Correct 6 ms 12116 KB Output is correct
3 Correct 9 ms 12124 KB Output is correct
4 Correct 6 ms 12116 KB Output is correct
5 Correct 6 ms 12200 KB Output is correct
6 Correct 7 ms 12208 KB Output is correct
7 Correct 7 ms 12116 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 12072 KB Output is correct
2 Correct 6 ms 12116 KB Output is correct
3 Correct 9 ms 12124 KB Output is correct
4 Correct 6 ms 12116 KB Output is correct
5 Correct 6 ms 12200 KB Output is correct
6 Correct 7 ms 12208 KB Output is correct
7 Correct 7 ms 12116 KB Output is correct
8 Correct 8 ms 12596 KB Output is correct
9 Correct 9 ms 12628 KB Output is correct
10 Correct 8 ms 12500 KB Output is correct
11 Correct 9 ms 12568 KB Output is correct
12 Correct 9 ms 12560 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 12072 KB Output is correct
2 Correct 6 ms 12116 KB Output is correct
3 Correct 9 ms 12124 KB Output is correct
4 Correct 6 ms 12116 KB Output is correct
5 Correct 6 ms 12200 KB Output is correct
6 Correct 7 ms 12208 KB Output is correct
7 Correct 7 ms 12116 KB Output is correct
8 Correct 8 ms 12596 KB Output is correct
9 Correct 9 ms 12628 KB Output is correct
10 Correct 8 ms 12500 KB Output is correct
11 Correct 9 ms 12568 KB Output is correct
12 Correct 9 ms 12560 KB Output is correct
13 Correct 11 ms 13012 KB Output is correct
14 Correct 11 ms 13140 KB Output is correct
15 Correct 12 ms 12984 KB Output is correct
16 Correct 11 ms 13068 KB Output is correct
17 Correct 12 ms 12984 KB Output is correct
18 Correct 10 ms 12884 KB Output is correct
19 Correct 12 ms 13076 KB Output is correct

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 474 ms 58320 KB Output is correct
2 Correct 416 ms 59816 KB Output is correct
3 Correct 400 ms 57156 KB Output is correct
4 Correct 469 ms 58008 KB Output is correct
5 Correct 426 ms 59852 KB Output is correct
6 Correct 454 ms 58216 KB Output is correct

Subtask #6
32.0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 12072 KB Output is correct
2 Correct 6 ms 12116 KB Output is correct
3 Correct 9 ms 12124 KB Output is correct
4 Correct 6 ms 12116 KB Output is correct
5 Correct 6 ms 12200 KB Output is correct
6 Correct 7 ms 12208 KB Output is correct
7 Correct 7 ms 12116 KB Output is correct
8 Correct 8 ms 12596 KB Output is correct
9 Correct 9 ms 12628 KB Output is correct
10 Correct 8 ms 12500 KB Output is correct
11 Correct 9 ms 12568 KB Output is correct
12 Correct 9 ms 12560 KB Output is correct
13 Correct 11 ms 13012 KB Output is correct
14 Correct 11 ms 13140 KB Output is correct
15 Correct 12 ms 12984 KB Output is correct
16 Correct 11 ms 13068 KB Output is correct
17 Correct 12 ms 12984 KB Output is correct
18 Correct 10 ms 12884 KB Output is correct
19 Correct 12 ms 13076 KB Output is correct
20 Correct 474 ms 58320 KB Output is correct
21 Correct 416 ms 59816 KB Output is correct
22 Correct 400 ms 57156 KB Output is correct
23 Correct 469 ms 58008 KB Output is correct
24 Correct 426 ms 59852 KB Output is correct
25 Correct 454 ms 58216 KB Output is correct
26 Correct 456 ms 58604 KB Output is correct
27 Correct 432 ms 60316 KB Output is correct
28 Correct 417 ms 61328 KB Output is correct
29 Correct 381 ms 57164 KB Output is correct
30 Correct 458 ms 58300 KB Output is correct
31 Correct 368 ms 53524 KB Output is correct
32 Correct 416 ms 60212 KB Output is correct
33 Correct 466 ms 58656 KB Output is correct
34 Correct 385 ms 57176 KB Output is correct
35 Correct 442 ms 58300 KB Output is correct
36 Correct 376 ms 62636 KB Output is correct