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답안 #624442

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
624442 2022-08-08T09:31:47 Z radal Designated Cities (JOI19_designated_cities) C++17
100 / 100
 624 ms 78684 KB 
#include <bits/stdc++.h>
#pragma GCC target("sse,sse2,avx2")
#pragma GCC optimize("unroll-loops,O2")
#define rep(i,l,r) for (int i = l; i < r; i++)
#define repr(i,r,l) for (int i = r; i >= l; i--)
#define X first
#define Y second
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define endl '\n'
#define debug(x) cerr << #x << " : " << x << endl;
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> pll;
constexpr ll N = 2e5+10,mod = 998244353,inf = 1e9+10,lg = 20;
inline int mkay(int a,int b){
    if (a+b >= mod) return a+b-mod;
    if (a+b < 0) return a+b+mod;
    return a+b;
}
 
inline int poww(int a,int k){
    if (k < 0) return 0;
    int z = 1;
    while (k){
        if (k&1) z = 1ll*z*a%mod;
        a = 1ll*a*a%mod;
        k /= 2;
    } 
    return z; 
}

int par[N][lg],h[N],r,U,V,sz[N],tin[N],T,lc;
ll opt[N],d[N][2],up[N],sum,lz[N*4];
pair<ll,int> mx[N],seg[N*4];
vector<int> ti;
vector<pair<int,pll>> adj[N];

void pre(int v,int p){
    par[v][0] = p;
    tin[v] = T++;
    ti.pb(v);
    sz[v] = 1;
    for (auto u : adj[v]){
        if (u.X == p) continue;
        h[u.X] = h[v]+1;
        d[u.X][0] = d[v][0]+u.Y.X;
        d[u.X][1] = d[v][1]+u.Y.Y;
        pre(u.X,v);
        up[v] += up[u.X]+u.Y.Y;
        sz[v] += sz[u.X];
    }
}

void dfs(int v,int p){
    if (adj[v].size() == 1){
        mx[v] = {d[v][0],v};
        return;
    }
    ll a = -1,b = -1;
    pll pa = {-1,-1};
    for (auto u : adj[v]){
        if (u.X == p) continue;
        dfs(u.X,v);
        mx[v] = max(mx[v],mx[u.X]);
        if (mx[u.X].X > a){
            swap(pa.X,pa.Y);
            b = a;
            a = mx[u.X].X;
            pa.X = mx[u.X].Y;
        }
        else if (mx[u.X].X > b){
            b = mx[u.X].X;
            pa.Y = mx[u.X].Y;
        }
    }
    if (b == -1) return;
    ll calc = sum-up[r]+d[v][1]-d[v][0]-a-b+2*d[v][0];
    if (calc < opt[2]){
        opt[2] = calc;
        U = pa.X;
        V = pa.Y;
        lc = v;
    }
}

int lca(int u,int v){
    if (h[u] < h[v]) swap(u,v);
    repr(i,lg-1,0){
        if ((1 << i) <= h[u]-h[v]) u = par[u][i];
    }
    if (v == u) return v;
    repr(i,lg-1,0){
        if (par[v][i] != par[u][i]){
            v = par[v][i];
            u = par[u][i];
        }
    }
    return par[v][0];
}

void build(int l,int r,int v = 1){
    if (r-l == 1){
        int u = ti[l];
        if (u == U || u == V || adj[u].size() != 1){
            seg[v] = {0,u};
            return;
        }
        int lc2 = lca(lc,u);
        if (lc2 != lc){
            seg[v] = {d[u][0]-d[lc2][0]+d[lc][1]-d[lc2][1],u};
            return;
        }
        lc2 = lca(u,U);
        if (lc2 == lc) lc2 = lca(u,V);
        seg[v] = {d[u][0]-d[lc2][0],u};
        return;
    }
    int m = (l+r) >> 1,u = (v << 1);
    build(l,m,u);
    build(m,r,u|1);
    seg[v] = max(seg[u],seg[u|1]);
}

void upd(int l,int r,int s,int e,ll x,int v = 1){
    if (s == l && r == e){
        seg[v].X += x;
        lz[v] += x;
        return;
    }
    int m = (l+r) >> 1,u = (v << 1);
    if (lz[v]){
        seg[u].X += lz[v];
        seg[u|1].X += lz[v];
        lz[u] += lz[v];
        lz[u|1] += lz[v];
        lz[v] = 0;
    }
    if (e <= m){
        upd(l,m,s,e,x,u);
        seg[v] = max(seg[u],seg[u|1]);
        return;
    }
    if (s >= m){
        upd(m,r,s,e,x,u|1);
        seg[v] = max(seg[u],seg[u|1]);
        return;
    }
    upd(l,m,s,m,x,u);
    upd(m,r,m,e,x,u|1);
    seg[v] = max(seg[u],seg[u|1]);
}
int32_t main(){
    ios :: sync_with_stdio(0); cin.tie(0);
    memset(opt,63,sizeof opt);
    int n;
    cin >> n;
    rep(i,1,n){
        int u,v,a,b;
        cin >> u >> v >> a >> b;
        adj[u].pb({v,{a,b}});
        adj[v].pb({u,{b,a}});
        sum += a;
        sum += b;
    }
    if (n == 2){
        int q;
        cin >> q;
        while (q--){
            int t;
            cin >> t;
            if (t == 2){
                cout << 0 << endl;
                continue;
            }
            if (t == 1){
                cout << min(adj[1][0].Y.Y,adj[1][0].Y.X) << endl;
                continue;
            }
        }
        return 0;
    }
    rep(i,1,n+1) if (adj[i].size() > 1) r = i;
    pre(r,0);
    rep(j,1,lg){
        rep(i,1,n+1){
            par[i][j] = par[par[i][j-1]][j-1];
        }
    }
    int leaf = 0;
    rep(i,1,n+1){
        opt[1] = min(opt[1],sum-up[r]+d[i][1]-d[i][0]);
        leaf += (adj[i].size() == 1);
    }
    dfs(r,0);
    set<int> st;
    st.insert(tin[U]);
    st.insert(tin[V]);
    int q;
    cin >> q;
    build(0,n);
    rep(i,3,leaf){
        pair<ll,int> p = seg[1];
        int v = seg[1].Y;
        upd(0,n,tin[v],tin[v]+1,-p.X);
        opt[i] = opt[i-1]-p.X;
        int lc2 = lca(v,lc);
        if (lc2 != lc){
            st.insert(tin[v]);
            int cur = par[lc][0],perv = lc;
            while (perv != lc2){
                upd(0,n,tin[cur],tin[cur]+sz[cur],-(d[lc][1]-d[cur][1]));
                upd(0,n,tin[perv],tin[perv]+sz[perv],d[lc][1]-d[cur][1]);
                perv = cur;
                cur = par[cur][0];
            }
            if (lc2 != r){
                upd(0,n,0,n,-(d[lc][1]-d[lc2][1]));
                upd(0,n,tin[lc2],tin[lc2]+sz[lc2],d[lc][1]-d[lc2][1]);
            }
            cur = par[v][0];
            perv = v;
            while (cur != lc2){
                upd(0,n,tin[cur],tin[cur]+sz[cur],-(d[cur][0]-d[lc2][0]));
                upd(0,n,tin[perv],tin[perv]+sz[perv],d[cur][0]-d[lc2][0]);
                perv = cur;
                cur = par[cur][0];
            }
            lc = lc2;
            continue;
        }
        auto it = st.lower_bound(tin[v]);
        int lc3 = -1;
        if (it != st.end()){
            int u = ti[*it];
            lc2 = lca(v,u);
        }
        if (it != st.begin()){
            it--;
            int u = ti[*it];
            lc3= lca(u,v);
        }
        if (lc3 != -1 && h[lc3] > h[lc2]) swap(lc3,lc2);
        st.insert(tin[v]);
        int cur = par[v][0];
        while(cur != lc2){
            upd(0,n,tin[cur],tin[cur]+sz[cur],-(d[cur][0]-d[par[cur][0]][0]));
            cur = par[cur][0];
        }
    }
    while (q--){
        int t;
        cin >> t;
        if (t >= leaf){
            cout << 0 << endl;
            continue;
        }
        cout << opt[t] << endl;
    }
    return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6484 KB Output is correct
2 Correct 3 ms 6600 KB Output is correct
3 Correct 3 ms 6612 KB Output is correct
4 Correct 4 ms 6612 KB Output is correct
5 Correct 3 ms 6612 KB Output is correct
6 Correct 4 ms 6612 KB Output is correct
7 Correct 4 ms 6612 KB Output is correct
8 Correct 3 ms 6596 KB Output is correct
9 Correct 3 ms 6612 KB Output is correct
10 Correct 4 ms 6612 KB Output is correct
11 Correct 3 ms 6612 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6592 KB Output is correct
2 Correct 508 ms 58008 KB Output is correct
3 Correct 293 ms 62076 KB Output is correct
4 Correct 436 ms 58180 KB Output is correct
5 Correct 573 ms 58368 KB Output is correct
6 Correct 573 ms 60644 KB Output is correct
7 Correct 519 ms 59908 KB Output is correct
8 Correct 329 ms 68668 KB Output is correct
9 Correct 624 ms 61424 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6484 KB Output is correct
2 Correct 522 ms 58080 KB Output is correct
3 Correct 286 ms 61232 KB Output is correct
4 Correct 463 ms 57852 KB Output is correct
5 Correct 525 ms 58348 KB Output is correct
6 Correct 576 ms 60428 KB Output is correct
7 Correct 582 ms 62284 KB Output is correct
8 Correct 504 ms 69904 KB Output is correct
9 Correct 571 ms 61160 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6484 KB Output is correct
2 Correct 3 ms 6600 KB Output is correct
3 Correct 3 ms 6612 KB Output is correct
4 Correct 4 ms 6612 KB Output is correct
5 Correct 3 ms 6612 KB Output is correct
6 Correct 4 ms 6612 KB Output is correct
7 Correct 4 ms 6612 KB Output is correct
8 Correct 3 ms 6596 KB Output is correct
9 Correct 3 ms 6612 KB Output is correct
10 Correct 4 ms 6612 KB Output is correct
11 Correct 3 ms 6612 KB Output is correct
12 Correct 3 ms 6484 KB Output is correct
13 Correct 6 ms 7120 KB Output is correct
14 Correct 5 ms 7316 KB Output is correct
15 Correct 6 ms 7124 KB Output is correct
16 Correct 6 ms 7124 KB Output is correct
17 Correct 6 ms 7124 KB Output is correct
18 Correct 7 ms 7124 KB Output is correct
19 Correct 6 ms 7124 KB Output is correct
20 Correct 6 ms 7124 KB Output is correct
21 Correct 6 ms 7124 KB Output is correct
22 Correct 6 ms 7212 KB Output is correct
23 Correct 6 ms 7244 KB Output is correct
24 Correct 6 ms 7252 KB Output is correct
25 Correct 6 ms 7252 KB Output is correct
26 Correct 7 ms 7252 KB Output is correct

Subtask #5
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6592 KB Output is correct
2 Correct 508 ms 58008 KB Output is correct
3 Correct 293 ms 62076 KB Output is correct
4 Correct 436 ms 58180 KB Output is correct
5 Correct 573 ms 58368 KB Output is correct
6 Correct 573 ms 60644 KB Output is correct
7 Correct 519 ms 59908 KB Output is correct
8 Correct 329 ms 68668 KB Output is correct
9 Correct 624 ms 61424 KB Output is correct
10 Correct 4 ms 6484 KB Output is correct
11 Correct 522 ms 58080 KB Output is correct
12 Correct 286 ms 61232 KB Output is correct
13 Correct 463 ms 57852 KB Output is correct
14 Correct 525 ms 58348 KB Output is correct
15 Correct 576 ms 60428 KB Output is correct
16 Correct 582 ms 62284 KB Output is correct
17 Correct 504 ms 69904 KB Output is correct
18 Correct 571 ms 61160 KB Output is correct
19 Correct 4 ms 6596 KB Output is correct
20 Correct 524 ms 57948 KB Output is correct
21 Correct 311 ms 68068 KB Output is correct
22 Correct 416 ms 62536 KB Output is correct
23 Correct 507 ms 64020 KB Output is correct
24 Correct 512 ms 62852 KB Output is correct
25 Correct 492 ms 64000 KB Output is correct
26 Correct 493 ms 62988 KB Output is correct
27 Correct 529 ms 64204 KB Output is correct
28 Correct 520 ms 66544 KB Output is correct
29 Correct 479 ms 63400 KB Output is correct
30 Correct 483 ms 63864 KB Output is correct
31 Correct 565 ms 66500 KB Output is correct
32 Correct 478 ms 74484 KB Output is correct
33 Correct 550 ms 67396 KB Output is correct

Subtask #6
44.0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6484 KB Output is correct
2 Correct 3 ms 6600 KB Output is correct
3 Correct 3 ms 6612 KB Output is correct
4 Correct 4 ms 6612 KB Output is correct
5 Correct 3 ms 6612 KB Output is correct
6 Correct 4 ms 6612 KB Output is correct
7 Correct 4 ms 6612 KB Output is correct
8 Correct 3 ms 6596 KB Output is correct
9 Correct 3 ms 6612 KB Output is correct
10 Correct 4 ms 6612 KB Output is correct
11 Correct 3 ms 6612 KB Output is correct
12 Correct 4 ms 6592 KB Output is correct
13 Correct 508 ms 58008 KB Output is correct
14 Correct 293 ms 62076 KB Output is correct
15 Correct 436 ms 58180 KB Output is correct
16 Correct 573 ms 58368 KB Output is correct
17 Correct 573 ms 60644 KB Output is correct
18 Correct 519 ms 59908 KB Output is correct
19 Correct 329 ms 68668 KB Output is correct
20 Correct 624 ms 61424 KB Output is correct
21 Correct 4 ms 6484 KB Output is correct
22 Correct 522 ms 58080 KB Output is correct
23 Correct 286 ms 61232 KB Output is correct
24 Correct 463 ms 57852 KB Output is correct
25 Correct 525 ms 58348 KB Output is correct
26 Correct 576 ms 60428 KB Output is correct
27 Correct 582 ms 62284 KB Output is correct
28 Correct 504 ms 69904 KB Output is correct
29 Correct 571 ms 61160 KB Output is correct
30 Correct 3 ms 6484 KB Output is correct
31 Correct 6 ms 7120 KB Output is correct
32 Correct 5 ms 7316 KB Output is correct
33 Correct 6 ms 7124 KB Output is correct
34 Correct 6 ms 7124 KB Output is correct
35 Correct 6 ms 7124 KB Output is correct
36 Correct 7 ms 7124 KB Output is correct
37 Correct 6 ms 7124 KB Output is correct
38 Correct 6 ms 7124 KB Output is correct
39 Correct 6 ms 7124 KB Output is correct
40 Correct 6 ms 7212 KB Output is correct
41 Correct 6 ms 7244 KB Output is correct
42 Correct 6 ms 7252 KB Output is correct
43 Correct 6 ms 7252 KB Output is correct
44 Correct 7 ms 7252 KB Output is correct
45 Correct 4 ms 6596 KB Output is correct
46 Correct 524 ms 57948 KB Output is correct
47 Correct 311 ms 68068 KB Output is correct
48 Correct 416 ms 62536 KB Output is correct
49 Correct 507 ms 64020 KB Output is correct
50 Correct 512 ms 62852 KB Output is correct
51 Correct 492 ms 64000 KB Output is correct
52 Correct 493 ms 62988 KB Output is correct
53 Correct 529 ms 64204 KB Output is correct
54 Correct 520 ms 66544 KB Output is correct
55 Correct 479 ms 63400 KB Output is correct
56 Correct 483 ms 63864 KB Output is correct
57 Correct 565 ms 66500 KB Output is correct
58 Correct 478 ms 74484 KB Output is correct
59 Correct 550 ms 67396 KB Output is correct
60 Correct 3 ms 6484 KB Output is correct
61 Correct 517 ms 66604 KB Output is correct
62 Correct 321 ms 70976 KB Output is correct
63 Correct 466 ms 65392 KB Output is correct
64 Correct 517 ms 66660 KB Output is correct
65 Correct 519 ms 65392 KB Output is correct
66 Correct 567 ms 66704 KB Output is correct
67 Correct 507 ms 65292 KB Output is correct
68 Correct 514 ms 67112 KB Output is correct
69 Correct 543 ms 68664 KB Output is correct
70 Correct 478 ms 65612 KB Output is correct
71 Correct 499 ms 66760 KB Output is correct
72 Correct 558 ms 69292 KB Output is correct
73 Correct 494 ms 78684 KB Output is correct
74 Correct 588 ms 71640 KB Output is correct