oj.uz

답안 #848429

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
848429 2023-09-12T15:18:00 Z TahirAliyev Paths (RMI21_paths) C++17
36 / 100
 600 ms 1036 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], rtimeIn[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[2 * node] += lazy[node];
        lazy[2 * node + 1] += lazy[node];
    }
    lazy[node] = 0;
}

void build(int node, int l, int r){
    if(l == r){
        segTree[node] = {pathVal[rtimeIn[l]], rtimeIn[l]};
        return;
    }
    int mid = (l + r) / 2;
    build(2 * node, l, mid);
    build(2 * node + 1, mid + 1, r);
    segTree[node] = max(segTree[2 * node], segTree[2 * node + 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) / 2;
    update(2 * node, l, mid, ul, ur, val);
    update(2 * node + 1, mid + 1, r, ul, ur, val);
    segTree[node] = max(segTree[2 * node], segTree[2 * node + 1]);
}

int t = 0;
void dfs(int node, int p, ll h){
    timeIn[node] = ++t;
    rtimeIn[t] = node;
    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;
}

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(lazy, 0, sizeof(lazy));
        memset(marked, 0, sizeof(marked));

        dfs(i, i, 0);
        build(1, 1, n);
        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, 1, n, 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:71:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:73:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   73 |         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 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 4 ms 856 KB Output is correct
4 Correct 5 ms 348 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 6 ms 600 KB Output is correct
7 Correct 6 ms 344 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 4 ms 856 KB Output is correct
4 Correct 5 ms 348 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 6 ms 600 KB Output is correct
7 Correct 6 ms 344 KB Output is correct
8 Correct 95 ms 600 KB Output is correct
9 Correct 138 ms 700 KB Output is correct
10 Correct 148 ms 676 KB Output is correct
11 Correct 53 ms 600 KB Output is correct
12 Correct 93 ms 600 KB Output is correct

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 4 ms 856 KB Output is correct
4 Correct 5 ms 348 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 6 ms 600 KB Output is correct
7 Correct 6 ms 344 KB Output is correct
8 Correct 95 ms 600 KB Output is correct
9 Correct 138 ms 700 KB Output is correct
10 Correct 148 ms 676 KB Output is correct
11 Correct 53 ms 600 KB Output is correct
12 Correct 93 ms 600 KB Output is correct
13 Execution timed out 654 ms 1036 KB Time limit exceeded
14 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 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 4 ms 856 KB Output is correct
4 Correct 5 ms 348 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 6 ms 600 KB Output is correct
7 Correct 6 ms 344 KB Output is correct
8 Correct 95 ms 600 KB Output is correct
9 Correct 138 ms 700 KB Output is correct
10 Correct 148 ms 676 KB Output is correct
11 Correct 53 ms 600 KB Output is correct
12 Correct 93 ms 600 KB Output is correct
13 Execution timed out 654 ms 1036 KB Time limit exceeded
14 Halted 0 ms 0 KB -