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Submission #539860

# Submission time Handle Problem Language Result Execution time Memory
539860 2022-03-19T07:46:01 Z doowey Paths (RMI21_paths) C++14
56 / 100
 464 ms 33088 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fi first
#define se second
#define mp make_pair
#define fastIO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);

const int N = (int)1e5 + 10;
vector<pll> T[N];

int k;
struct magic_set{
    set<pll> ms;
    int cnt = 0;
    pll V = mp(-1,-1);
    ll sum = 0;
    // sum of all elements >= V
    void relocate(){
        auto it = ms.lower_bound(V);
        while(cnt > k){
            sum -= it->fi;
            cnt -- ;
            it ++ ;
            V = *it;
        }
        while(cnt < k){
            if(it == ms.begin()) break;
            it -- ;
            sum += it->fi;
            cnt ++ ;
            V = *it;
        }
    }
    void ins(pll X){
        ms.insert(X);
        if(X >= V){
            sum += X.fi;
            cnt++;
        }
        relocate();
    }
    void del(pll X){
        if(X >= V){
            sum -= X.fi;
            cnt -- ;
        }
        ms.erase(X);
        relocate();
    }
};

magic_set Z[N];
pll A[N], B[N];

magic_set G;

void dfs0(int u, int p){
    Z[u].ins(mp(0ll, u));
    for(auto x : T[u]){
        if(x.fi == p) continue;
        dfs0(x.fi, u);

        auto it = Z[x.fi].ms.end();
        it -- ;
        A[x.fi] = *it;
        B[x.fi] = mp(it->fi + x.se, it->se);
        Z[x.fi].del(A[x.fi]);
        Z[x.fi].ins(B[x.fi]);
        if(Z[u].ms.size() < Z[x.fi].ms.size()){
            swap(Z[u], Z[x.fi]);
        }
        for(auto x : Z[x.fi].ms){
            Z[u].ins(x);
        }
        Z[x.fi].ms.clear();
        Z[x.fi].sum = 0;
        Z[x.fi].cnt = 0;
    }
}

ll sol[N];

void reroot(int u, int v, pll go){
    sol[u] = G.sum;
    pll m1 = mp(0, u);
    pll m2 = mp(0, u);
    int a1 = u;
    int a2 = u;
    pll nx;
    for(auto x : T[u]){
        if(x.fi == v) continue;
        if(B[x.fi] > m1){
            m2 = m1;
            a2 = a1;
            m1 = B[x.fi];
            a1 = x.fi;
        }
        else if(B[x.fi] > m2){
            m2 = B[x.fi];
            a2 = x.fi;
        }
    }
    pll d1, i1;
    pll d2, i2;
    for(auto x : T[u]){
        if(x.fi == v) continue;
        d1 = B[x.fi];
        i1 = A[x.fi];
        nx = go;
        if(x.fi != a1){
            nx = max(nx, m1);
        }
        else{
            nx = max(nx, m2);
        }
        d2 = nx;
        i2 = mp(nx.fi + x.se, nx.se);
        G.del(d1);
        G.del(d2);
        G.ins(i1);
        G.ins(i2);
        reroot(x.fi, u, i2);
        G.ins(d1);
        G.ins(d2);
        G.del(i1);
        G.del(i2);
    }
}

int main(){
    fastIO;
    //freopen("in.txt","r",stdin);
    int n;
    cin >> n >> k;
    int u, v, w;
    for(int i = 1; i < n; i ++ ){
        cin >> u >> v >> w;
        T[u].push_back(mp(v, w));
        T[v].push_back(mp(u, w));
    }
    dfs0(1, -1);
    G = Z[1];
    reroot(1, -1, mp(-1ll, -1ll));
    for(int i = 1; i <= n; i ++ ){
        cout << sol[i] << "\n";
    }
    return 0;
}

Compilation message

Main.cpp: In function 'void reroot(int, int, pll)':
Main.cpp:94:9: warning: variable 'a2' set but not used [-Wunused-but-set-variable]
   94 |     int a2 = u;
      |         ^~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10452 KB Output is correct
2 Correct 6 ms 10496 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10452 KB Output is correct
2 Correct 6 ms 10496 KB Output is correct
3 Correct 7 ms 10460 KB Output is correct
4 Correct 6 ms 10452 KB Output is correct
5 Correct 7 ms 10452 KB Output is correct
6 Correct 6 ms 10508 KB Output is correct
7 Correct 6 ms 10452 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10452 KB Output is correct
2 Correct 6 ms 10496 KB Output is correct
3 Correct 7 ms 10460 KB Output is correct
4 Correct 6 ms 10452 KB Output is correct
5 Correct 7 ms 10452 KB Output is correct
6 Correct 6 ms 10508 KB Output is correct
7 Correct 6 ms 10452 KB Output is correct
8 Correct 9 ms 10708 KB Output is correct
9 Correct 9 ms 10792 KB Output is correct
10 Correct 8 ms 10708 KB Output is correct
11 Correct 10 ms 10744 KB Output is correct
12 Correct 10 ms 10748 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10452 KB Output is correct
2 Correct 6 ms 10496 KB Output is correct
3 Correct 7 ms 10460 KB Output is correct
4 Correct 6 ms 10452 KB Output is correct
5 Correct 7 ms 10452 KB Output is correct
6 Correct 6 ms 10508 KB Output is correct
7 Correct 6 ms 10452 KB Output is correct
8 Correct 9 ms 10708 KB Output is correct
9 Correct 9 ms 10792 KB Output is correct
10 Correct 8 ms 10708 KB Output is correct
11 Correct 10 ms 10744 KB Output is correct
12 Correct 10 ms 10748 KB Output is correct
13 Correct 11 ms 10964 KB Output is correct
14 Correct 9 ms 11092 KB Output is correct
15 Correct 10 ms 10984 KB Output is correct
16 Correct 8 ms 10964 KB Output is correct
17 Correct 11 ms 10868 KB Output is correct
18 Correct 9 ms 10876 KB Output is correct
19 Correct 14 ms 10964 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 464 ms 33088 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10452 KB Output is correct
2 Correct 6 ms 10496 KB Output is correct
3 Correct 7 ms 10460 KB Output is correct
4 Correct 6 ms 10452 KB Output is correct
5 Correct 7 ms 10452 KB Output is correct
6 Correct 6 ms 10508 KB Output is correct
7 Correct 6 ms 10452 KB Output is correct
8 Correct 9 ms 10708 KB Output is correct
9 Correct 9 ms 10792 KB Output is correct
10 Correct 8 ms 10708 KB Output is correct
11 Correct 10 ms 10744 KB Output is correct
12 Correct 10 ms 10748 KB Output is correct
13 Correct 11 ms 10964 KB Output is correct
14 Correct 9 ms 11092 KB Output is correct
15 Correct 10 ms 10984 KB Output is correct
16 Correct 8 ms 10964 KB Output is correct
17 Correct 11 ms 10868 KB Output is correct
18 Correct 9 ms 10876 KB Output is correct
19 Correct 14 ms 10964 KB Output is correct
20 Incorrect 464 ms 33088 KB Output isn't correct
21 Halted 0 ms 0 KB -