oj.uz

답안 #848496

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
848496 2023-09-12T19:19:53 Z TahirAliyev Paths (RMI21_paths) C++17
36 / 100
 600 ms 992 KB 
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
 
using namespace std;
 
#define ll long long int
#define oo 1e9
#define pii pair<ll, int>

const int MAX = 2002;
int n, k;

pii segTree[4 * MAX];
ll lazy[4 * MAX];

vector<pii> g[MAX];
int timeIn[MAX], timeOut[MAX], leafs[MAX];
ll pathVal[MAX];
bool marked[MAX];
pii par[MAX];

void relax(int node, int l, int r){
    if(lazy[node] == 0) return;
    segTree[node].first += lazy[node];
    if(l != r){
        lazy[node << 1] += lazy[node];
        lazy[node << 1 | 1] += lazy[node];
    }
    lazy[node] = 0;
}

void build(int node, int l, int r){
    lazy[node] = 0;
    if(l == r){
        segTree[node] = {pathVal[leafs[l]], leafs[l]};
        return;
    }
    int mid = (l + r) >> 1;
    build(node << 1, l, mid);
    build(node << 1 | 1, mid + 1, r);
    segTree[node] = max(segTree[node << 1], segTree[node << 1| 1]);
}

void update(int node, int l, int r, int ul, int ur, ll val){
    relax(node, l, r);
    if(ul > r || l > ur) return;
    if(ul <= l && r <= ur){
        lazy[node] += val;
        relax(node, l, r);
        return;
    }
    int mid = (l + r) >> 1;
    update(node << 1, l, mid, ul, ur, val);
    update(node << 1 | 1, mid + 1, r, ul, ur, val);
    segTree[node] = max(segTree[node << 1], segTree[node << 1 | 1]);
}


int t = 1;
void dfs(int node, int p, ll h){
    timeIn[node] = t;
    pathVal[node] = h;
    for(pii to : g[node]){
        if(p == to.first) continue;
        par[to.first] = make_pair(node, to.second);
        dfs(to.first, node, h + to.second);
    }
    timeOut[node] = t - 1;
    if(g[node].size() == 1 && node != p){
        leafs[t] = node;
        timeOut[node] = t++;
    }
}

int main(){
    scanf("%d%d", &n, &k);
    for(int i = 1; i < n; i++){
        int u, v, a; scanf("%d%d%d", &u, &v, &a);
        g[u].push_back({v, a});
        g[v].push_back({u, a});
    }
    for(int i = 1; i <= n; i++){
        t = 0;
        memset(marked, 0, sizeof(marked));

        dfs(i, i, 0);
        build(1, 0, t - 1);
        ll ans = 0;
        for(int j = 0; j < k; j++){
            pii m = segTree[1];
            if(m.first == 0) break;
            ans += m.first;
            int a = m.second;
            while(a != i){
                if(marked[a]) break;
                update(1, 0, t - 1, timeIn[a], timeOut[a], -par[a].second);
                marked[a] = true;
                a = par[a].first;
            }
        }
        cout << ans << '\n';
    }
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:76:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:78:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |         int u, v, a; scanf("%d%d%d", &u, &v, &a);
      |                      ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 3 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 3 ms 344 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 3 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 3 ms 344 KB Output is correct
8 Correct 77 ms 604 KB Output is correct
9 Correct 93 ms 652 KB Output is correct
10 Correct 69 ms 616 KB Output is correct
11 Correct 41 ms 600 KB Output is correct
12 Correct 60 ms 860 KB Output is correct

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 3 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 3 ms 344 KB Output is correct
8 Correct 77 ms 604 KB Output is correct
9 Correct 93 ms 652 KB Output is correct
10 Correct 69 ms 616 KB Output is correct
11 Correct 41 ms 600 KB Output is correct
12 Correct 60 ms 860 KB Output is correct
13 Correct 584 ms 600 KB Output is correct
14 Correct 431 ms 600 KB Output is correct
15 Correct 230 ms 720 KB Output is correct
16 Correct 382 ms 992 KB Output is correct
17 Correct 483 ms 700 KB Output is correct
18 Correct 224 ms 600 KB Output is correct
19 Execution timed out 631 ms 852 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 1 ms 600 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 3 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 3 ms 344 KB Output is correct
8 Correct 77 ms 604 KB Output is correct
9 Correct 93 ms 652 KB Output is correct
10 Correct 69 ms 616 KB Output is correct
11 Correct 41 ms 600 KB Output is correct
12 Correct 60 ms 860 KB Output is correct
13 Correct 584 ms 600 KB Output is correct
14 Correct 431 ms 600 KB Output is correct
15 Correct 230 ms 720 KB Output is correct
16 Correct 382 ms 992 KB Output is correct
17 Correct 483 ms 700 KB Output is correct
18 Correct 224 ms 600 KB Output is correct
19 Execution timed out 631 ms 852 KB Time limit exceeded
20 Halted 0 ms 0 KB -