oj.uz

Submission #230054

# Submission time Handle Problem Language Result Execution time Memory
230054 2020-05-07T23:07:40 Z liwi Election Campaign (JOI15_election_campaign) C++14
100 / 100
 793 ms 72696 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;

#define scan(x) do{while((x=getchar())<'0'); for(x-='0'; '0'<=(_=getchar()); x=(x<<3)+(x<<1)+_-'0');}while(0)
char _;
#define complete_unique(a) a.erase(unique(a.begin(),a.end()),a.end())
#define all(a) a.begin(),a.end()
#define println printf("\n");
#define readln(x) getline(cin,x);
#define pb push_back
#define endl "\n"
#define INT_INF 0x3f3f3f3f
#define LL_INF 0x3f3f3f3f3f3f3f3f
#define EPS 1e-9
#define MOD 1000000007
#define MOD2 1494318097
#define SEED 131
#define mp make_pair
#define fastio cin.tie(0); cin.sync_with_stdio(0);

#define MAXN 100005

typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef pair<int,pii> triple;
typedef int8_t byte;

const ld PI = (ld)4*atanl(1);

mt19937 g1(chrono::steady_clock::now().time_since_epoch().count());

int randint(int a, int b){return uniform_int_distribution<int>(a, b)(g1);}
ll randlong(ll a,ll b){return uniform_int_distribution<long long>(a, b)(g1);}

ll gcd(ll a, ll b){return b == 0 ? a : gcd(b, a % b);}
ll lcm(ll a, ll b){return a*b/gcd(a,b);}
ll fpow(ll  b, ll exp, ll mod){if(exp == 0) return 1;ll t = fpow(b,exp/2,mod);if(exp&1) return t*t%mod*b%mod;return t*t%mod;}
ll divmod(ll i, ll j, ll mod){i%=mod,j%=mod;return i*fpow(j,mod-2,mod)%mod;}

template<typename T>
struct node{
    int l,r;
    T mx,mn,sum,lazy;
};

template<typename T>
struct HLDSegTree{
    node<T> seg[4*MAXN];
    inline ll sz(int rt){return seg[rt].r-seg[rt].l+1;}
    inline void push_up(int rt){
        seg[rt].mx = max(seg[rt<<1].mx,seg[rt<<1|1].mx);
        seg[rt].mn = min(seg[rt<<1].mn,seg[rt<<1|1].mn);
        seg[rt].sum = seg[rt<<1].sum+seg[rt<<1|1].sum;
    }
    inline void push_down(int rt){
        seg[rt<<1].mx+=seg[rt].lazy, seg[rt<<1|1].mx+=seg[rt].lazy;
        seg[rt<<1].mn+=seg[rt].lazy, seg[rt<<1|1].mn+=seg[rt].lazy;
        seg[rt<<1].sum+=seg[rt].lazy*sz(rt<<1), seg[rt<<1|1].sum+=seg[rt].lazy*sz(rt<<1|1);
        seg[rt<<1].lazy+=seg[rt].lazy, seg[rt<<1|1].lazy+=seg[rt].lazy;
        seg[rt].lazy = 0;
    }
    void build(int l, int r, int rt){
        seg[rt].l = l, seg[rt].r = r, seg[rt].sum = seg[rt].lazy = 0, seg[rt].mn = INT_INF, seg[rt].mx = -INT_INF;
        if(l == r) return;
        int mid = (l+r)/2;
        build(l,mid,rt<<1);
        build(mid+1,r,rt<<1|1);
    }
    void update(int l, int r, int rt, T val){
        if(l > r) return;
        if(seg[rt].l == l && seg[rt].r == r){
            seg[rt].mx+=val, seg[rt].mn+=val, seg[rt].lazy+=val;
            seg[rt].sum+=val*sz(rt);
            return;
        }
        if(seg[rt].lazy) push_down(rt);
        int mid = (seg[rt].l+seg[rt].r)/2;
        if(r <= mid) update(l,r,rt<<1,val);
        else if(l > mid) update(l,r,rt<<1|1,val);
        else update(l,mid,rt<<1,val), update(mid+1,r,rt<<1|1,val);
        push_up(rt);
    }
    T query(int l, int r, int rt){
        if(seg[rt].l == l && seg[rt].r == r) return seg[rt].sum;
        if(seg[rt].lazy) push_down(rt);
        int mid = (seg[rt].l+seg[rt].r)/2;
        if(r <= mid) return query(l,r,rt<<1);
        else if(l > mid) return query(l,r,rt<<1|1);
        return query(l,mid,rt<<1)+query(mid+1,r,rt<<1|1);
    }
};

template<typename T>
struct HLD{
    int sz[MAXN],heavy[MAXN],par[MAXN],head[MAXN],depth[MAXN],pos[MAXN],cnt=0;
    HLDSegTree<T> seg;
    vector<pair<int,ll>> connections[MAXN];
    vector<pair<pii,int>> paths[MAXN];
    inline void add_edge(int a, int b, ll val = 0){
        connections[a].pb(mp(b,val));
        connections[b].pb(mp(a,val));
    }
    int dfs(int node, int prev){
        sz[node] = 1;
        for(pair<int,ll> check:connections[node]){
            if(check.first == prev) continue;
            par[check.first] = node, depth[check.first] = depth[node]+1;
            int tmp = dfs(check.first,node);
            if(tmp > sz[heavy[node]]) heavy[node] = check.first;
            sz[node]+=tmp;
        }
        return sz[node];
    }
    void decompose(int node, int prev, int hh){
        head[node] = hh, pos[node] = ++cnt;
        if(heavy[node]) decompose(heavy[node],node,hh);
        for(pair<int,ll> check:connections[node]){
            if(check.first == prev || check.first == heavy[node]) continue;
            decompose(check.first,node,check.first);
        }
    }
    inline void init(){
        memset(heavy,0,sizeof heavy);
        memset(head,0,sizeof head);
        memset(depth,0,sizeof depth);
        memset(par,0,sizeof par);
        dfs(1,-1);
        decompose(1,-1,1);
        seg.build(1,cnt,1);
    }
    inline int lca(int a, int b){
        for(; head[a] != head[b]; b = par[head[b]])
            if(depth[head[a]] > depth[head[b]]) swap(a,b);
        if(depth[a] > depth[b]) swap(a,b);
        return a;
    }
    inline void update(int a, int b, T v){
        for(; head[a] != head[b]; b = par[head[b]]){
            if(depth[head[a]] > depth[head[b]]) swap(a,b);
            seg.update(pos[head[b]],pos[b],1,v);
        }
        if(depth[a] > depth[b]) swap(a,b);
        seg.update(pos[a],pos[b],1,v);
    }
    inline T query(int a, int b){
        T res = 0;
        for(; head[a] != head[b]; b = par[head[b]]){
            if(depth[head[a]] > depth[head[b]]) swap(a,b);
            res+=seg.query(pos[head[b]],pos[b],1);
        }
        if(depth[a] > depth[b]) swap(a,b);
        return res+seg.query(pos[a],pos[b],1);
    }
};

int N,M;
ll dp[MAXN],ch_sum[MAXN];
HLD<ll> hld,d;

void solve(int node, int prev){
    for(auto check:hld.connections[node]){
        if(check.first == prev) continue;
        solve(check.first,node);
        ch_sum[node]+=dp[check.first];
    }
    dp[node] = ch_sum[node];
    hld.update(node,node,ch_sum[node]);
    for(pair<pii,int> check:hld.paths[node]){
        ll val = hld.query(check.first.first,check.first.second)-d.query(check.first.first,check.first.second)+check.second;
        dp[node] = max(dp[node],val);
    }
    d.update(node,node,dp[node]);
}

int main(){
    fastio; cin >> N;
    for(int i=1; i<N; i++){
        int a,b; cin >> a >> b;
        hld.add_edge(a,b);
        d.add_edge(a,b);
    }
    hld.init();
    d.init();
    cin >> M;
    for(int i=1; i<=M; i++){
        int a,b,c; cin >> a >> b >> c;
        hld.paths[hld.lca(a,b)].pb(mp(mp(a,b),c));
    }
    solve(1,-1);
    cout << dp[1] << endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12928 KB Output is correct
2 Correct 12 ms 12928 KB Output is correct
3 Correct 12 ms 12928 KB Output is correct
4 Correct 13 ms 13184 KB Output is correct
5 Correct 248 ms 48632 KB Output is correct
6 Correct 137 ms 68984 KB Output is correct
7 Correct 200 ms 62200 KB Output is correct
8 Correct 170 ms 46524 KB Output is correct
9 Correct 193 ms 57848 KB Output is correct
10 Correct 172 ms 46396 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12928 KB Output is correct
2 Correct 12 ms 12928 KB Output is correct
3 Correct 13 ms 13440 KB Output is correct
4 Correct 251 ms 72376 KB Output is correct
5 Correct 237 ms 72312 KB Output is correct
6 Correct 212 ms 72440 KB Output is correct
7 Correct 243 ms 72352 KB Output is correct
8 Correct 245 ms 72236 KB Output is correct
9 Correct 211 ms 72312 KB Output is correct
10 Correct 238 ms 72312 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12928 KB Output is correct
2 Correct 12 ms 12928 KB Output is correct
3 Correct 13 ms 13440 KB Output is correct
4 Correct 251 ms 72376 KB Output is correct
5 Correct 237 ms 72312 KB Output is correct
6 Correct 212 ms 72440 KB Output is correct
7 Correct 243 ms 72352 KB Output is correct
8 Correct 245 ms 72236 KB Output is correct
9 Correct 211 ms 72312 KB Output is correct
10 Correct 238 ms 72312 KB Output is correct
11 Correct 26 ms 14208 KB Output is correct
12 Correct 252 ms 72572 KB Output is correct
13 Correct 239 ms 72568 KB Output is correct
14 Correct 213 ms 72568 KB Output is correct
15 Correct 243 ms 72696 KB Output is correct
16 Correct 214 ms 72568 KB Output is correct
17 Correct 239 ms 72568 KB Output is correct
18 Correct 241 ms 72672 KB Output is correct
19 Correct 218 ms 72584 KB Output is correct
20 Correct 239 ms 72696 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 793 ms 51412 KB Output is correct
2 Correct 212 ms 72312 KB Output is correct
3 Correct 394 ms 64760 KB Output is correct
4 Correct 375 ms 49520 KB Output is correct
5 Correct 326 ms 63236 KB Output is correct
6 Correct 369 ms 49324 KB Output is correct
7 Correct 402 ms 62772 KB Output is correct
8 Correct 480 ms 51192 KB Output is correct
9 Correct 215 ms 72312 KB Output is correct
10 Correct 421 ms 60208 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12928 KB Output is correct
2 Correct 12 ms 12928 KB Output is correct
3 Correct 12 ms 12928 KB Output is correct
4 Correct 13 ms 13184 KB Output is correct
5 Correct 248 ms 48632 KB Output is correct
6 Correct 137 ms 68984 KB Output is correct
7 Correct 200 ms 62200 KB Output is correct
8 Correct 170 ms 46524 KB Output is correct
9 Correct 193 ms 57848 KB Output is correct
10 Correct 172 ms 46396 KB Output is correct
11 Correct 14 ms 13312 KB Output is correct
12 Correct 13 ms 13440 KB Output is correct
13 Correct 13 ms 13440 KB Output is correct
14 Correct 13 ms 13312 KB Output is correct
15 Correct 14 ms 13312 KB Output is correct
16 Correct 13 ms 13312 KB Output is correct
17 Correct 14 ms 13184 KB Output is correct
18 Correct 13 ms 13440 KB Output is correct
19 Correct 13 ms 13312 KB Output is correct
20 Correct 13 ms 13440 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12928 KB Output is correct
2 Correct 12 ms 12928 KB Output is correct
3 Correct 12 ms 12928 KB Output is correct
4 Correct 13 ms 13184 KB Output is correct
5 Correct 248 ms 48632 KB Output is correct
6 Correct 137 ms 68984 KB Output is correct
7 Correct 200 ms 62200 KB Output is correct
8 Correct 170 ms 46524 KB Output is correct
9 Correct 193 ms 57848 KB Output is correct
10 Correct 172 ms 46396 KB Output is correct
11 Correct 12 ms 12928 KB Output is correct
12 Correct 12 ms 12928 KB Output is correct
13 Correct 13 ms 13440 KB Output is correct
14 Correct 251 ms 72376 KB Output is correct
15 Correct 237 ms 72312 KB Output is correct
16 Correct 212 ms 72440 KB Output is correct
17 Correct 243 ms 72352 KB Output is correct
18 Correct 245 ms 72236 KB Output is correct
19 Correct 211 ms 72312 KB Output is correct
20 Correct 238 ms 72312 KB Output is correct
21 Correct 26 ms 14208 KB Output is correct
22 Correct 252 ms 72572 KB Output is correct
23 Correct 239 ms 72568 KB Output is correct
24 Correct 213 ms 72568 KB Output is correct
25 Correct 243 ms 72696 KB Output is correct
26 Correct 214 ms 72568 KB Output is correct
27 Correct 239 ms 72568 KB Output is correct
28 Correct 241 ms 72672 KB Output is correct
29 Correct 218 ms 72584 KB Output is correct
30 Correct 239 ms 72696 KB Output is correct
31 Correct 793 ms 51412 KB Output is correct
32 Correct 212 ms 72312 KB Output is correct
33 Correct 394 ms 64760 KB Output is correct
34 Correct 375 ms 49520 KB Output is correct
35 Correct 326 ms 63236 KB Output is correct
36 Correct 369 ms 49324 KB Output is correct
37 Correct 402 ms 62772 KB Output is correct
38 Correct 480 ms 51192 KB Output is correct
39 Correct 215 ms 72312 KB Output is correct
40 Correct 421 ms 60208 KB Output is correct
41 Correct 14 ms 13312 KB Output is correct
42 Correct 13 ms 13440 KB Output is correct
43 Correct 13 ms 13440 KB Output is correct
44 Correct 13 ms 13312 KB Output is correct
45 Correct 14 ms 13312 KB Output is correct
46 Correct 13 ms 13312 KB Output is correct
47 Correct 14 ms 13184 KB Output is correct
48 Correct 13 ms 13440 KB Output is correct
49 Correct 13 ms 13312 KB Output is correct
50 Correct 13 ms 13440 KB Output is correct
51 Correct 479 ms 51576 KB Output is correct
52 Correct 240 ms 72568 KB Output is correct
53 Correct 414 ms 60844 KB Output is correct
54 Correct 307 ms 49664 KB Output is correct
55 Correct 788 ms 51740 KB Output is correct
56 Correct 249 ms 72568 KB Output is correct
57 Correct 328 ms 62328 KB Output is correct
58 Correct 372 ms 49812 KB Output is correct
59 Correct 491 ms 51448 KB Output is correct
60 Correct 236 ms 72568 KB Output is correct
61 Correct 327 ms 62584 KB Output is correct
62 Correct 378 ms 49304 KB Output is correct
63 Correct 776 ms 51568 KB Output is correct
64 Correct 245 ms 72696 KB Output is correct
65 Correct 403 ms 62512 KB Output is correct
66 Correct 311 ms 50044 KB Output is correct
67 Correct 753 ms 51564 KB Output is correct
68 Correct 236 ms 72568 KB Output is correct
69 Correct 323 ms 59128 KB Output is correct
70 Correct 346 ms 49828 KB Output is correct