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답안 #1034323

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1034323 2024-07-25T12:17:56 Z Shayan86 Designated Cities (JOI19_designated_cities) C++14
100 / 100
 254 ms 58448 KB 
#include <bits/stdc++.h>
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// Ofast, O0, O1, O2, O3, unroll-loops, fast-math, trapv

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

#define Mp          make_pair
#define sep         ' '
#define endl        '\n'
#define F	        first
#define S	        second
#define pb          push_back
#define SZ(x)       (int)x.size()
#define all(x)      (x).begin(),(x).end()
#define kill(res)	cout << res << '\n', exit(0);
#define set_dec(x)	cout << fixed << setprecision(x);
#define fast_io     ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io     freopen("input.txt", "r", stdin) ; freopen("output.txt", "w", stdout);

#define lid (id*2)
#define rid (id*2+1)
#define mid ((l+r)/2)

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

const ll N = 2e5 + 50;
const ll inf = 1e18;

ll n, val, res[N], h[N], timer, st[N], ft[N], tim[N];
pll par[N];

bool mark[N];
vector<pair<int, pii>> adj[N];

void dfs1(int v, int p = 0){
    for(auto [u, w]: adj[v]){
        if(u == p) continue;
        dfs1(u, v); val += w.F;
    }
}

void dfs2(int v, int p = 0){
    res[1] = min(res[1], val);
    for(auto [u, w]: adj[v]){
        if(u == p) continue;
        val += w.S - w.F;
        dfs2(u, v);
        val -= w.S - w.F;
    }
}

void dfs3(int v, int p = 0){
    for(auto [u, w]: adj[v]){
        if(u == p) continue;
        h[u] = h[v] + w.F;
        dfs3(u, v);
    }
}

void dfs(int v, int p = 0){
    tim[timer] = v;
    st[v] = timer++;
    for(auto [u, w]: adj[v]){
        if(u == p) continue;
        h[u] = h[v] + w.F;
        res[1] += w.F;
        par[u] = {v, w.F};
        dfs(u, v);
    }
    ft[v] = timer;
}

pll seg[N*4]; ll lz[N*4];

void build(int l, int r, int id = 1){
    if(l+1 == r){
        seg[id] = {h[tim[l]], tim[l]};
        return;
    }
    build(l, mid, lid);
    build(mid, r, rid);
    seg[id] = max(seg[lid], seg[rid]);
}

void quex(int id, ll x){
    seg[id].F += x; lz[id] += x;
}

void relax(int id){
    quex(lid, lz[id]);
    quex(rid, lz[id]);
    lz[id] = 0;
}

void upd(int ql, int qr, ll x, int l = 0, int r = n, int id = 1){
    if(ql <= l && r <= qr){
        quex(id, x); return;
    }
    if(qr <= l || r <= ql) return;
    relax(id);
    upd(ql, qr, x, l, mid, lid);
    upd(ql, qr, x, mid, r, rid);
    seg[id] = max(seg[lid], seg[rid]);
}

pll get(int ql, int qr, int l = 0, int r = n, int id = 1){
    if(ql <= l && r <= qr) return seg[id];
    if(qr <= l || r <= ql) return {0, 0};
    relax(id);
    return max(get(ql, qr, l, mid, lid), get(ql, qr, mid, r, rid));
}

int main(){
    fast_io;
    
    cin >> n;

    for(int i = 1; i < n; i++){
        int a, b, c, d;
        cin >> a >> b >> c >> d;
        adj[a].pb({b, {c, d}});
        adj[b].pb({a, {d, c}});
    }

    dfs3(1);
    int far = 0;
    for(int i = 1; i <= n; i++) if(h[far] <= h[i]) far = i;
    h[far] = 0; dfs(far);

    build(0, n);

    mark[far] = true;
    for(int i = 2; i <= n; i++){
        pll mx = get(0, n);
        res[i] = res[i-1] - mx.F;

        int v = mx.S;
        while(!mark[v]){
            upd(st[v], ft[v], -par[v].S);
            mark[v] = true; v = par[v].F;
        }
    }

    dfs1(1);
    res[1] = inf;
    dfs2(1);

    int q; cin >> q;
    for(int i = 1; i <= q; i++){
        int x; cin >> x;
        cout << res[x] << endl;
    }

}

Compilation message

designated_cities.cpp: In function 'void dfs1(int, int)':
designated_cities.cpp:41:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   41 |     for(auto [u, w]: adj[v]){
      |              ^
designated_cities.cpp: In function 'void dfs2(int, int)':
designated_cities.cpp:49:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   49 |     for(auto [u, w]: adj[v]){
      |              ^
designated_cities.cpp: In function 'void dfs3(int, int)':
designated_cities.cpp:58:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   58 |     for(auto [u, w]: adj[v]){
      |              ^
designated_cities.cpp: In function 'void dfs(int, int)':
designated_cities.cpp:68:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   68 |     for(auto [u, w]: adj[v]){
      |              ^

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5208 KB Output is correct
2 Correct 2 ms 5208 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 2 ms 5212 KB Output is correct
5 Correct 2 ms 5212 KB Output is correct
6 Correct 3 ms 5108 KB Output is correct
7 Correct 2 ms 5208 KB Output is correct
8 Correct 2 ms 5212 KB Output is correct
9 Correct 2 ms 5212 KB Output is correct
10 Correct 3 ms 5212 KB Output is correct
11 Correct 2 ms 5212 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5172 KB Output is correct
2 Correct 198 ms 43068 KB Output is correct
3 Correct 208 ms 57172 KB Output is correct
4 Correct 172 ms 41832 KB Output is correct
5 Correct 181 ms 43020 KB Output is correct
6 Correct 202 ms 44932 KB Output is correct
7 Correct 168 ms 43008 KB Output is correct
8 Correct 238 ms 56148 KB Output is correct
9 Correct 159 ms 43512 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5212 KB Output is correct
2 Correct 185 ms 43240 KB Output is correct
3 Correct 181 ms 56912 KB Output is correct
4 Correct 201 ms 41808 KB Output is correct
5 Correct 183 ms 43244 KB Output is correct
6 Correct 187 ms 45540 KB Output is correct
7 Correct 163 ms 43220 KB Output is correct
8 Correct 239 ms 52564 KB Output is correct
9 Correct 152 ms 43112 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5208 KB Output is correct
2 Correct 2 ms 5208 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 2 ms 5212 KB Output is correct
5 Correct 2 ms 5212 KB Output is correct
6 Correct 3 ms 5108 KB Output is correct
7 Correct 2 ms 5208 KB Output is correct
8 Correct 2 ms 5212 KB Output is correct
9 Correct 2 ms 5212 KB Output is correct
10 Correct 3 ms 5212 KB Output is correct
11 Correct 2 ms 5212 KB Output is correct
12 Correct 2 ms 5208 KB Output is correct
13 Correct 3 ms 5468 KB Output is correct
14 Correct 3 ms 5528 KB Output is correct
15 Correct 3 ms 5436 KB Output is correct
16 Correct 4 ms 5468 KB Output is correct
17 Correct 4 ms 5468 KB Output is correct
18 Correct 4 ms 5468 KB Output is correct
19 Correct 5 ms 5724 KB Output is correct
20 Correct 5 ms 5524 KB Output is correct
21 Correct 4 ms 5528 KB Output is correct
22 Correct 3 ms 5464 KB Output is correct
23 Correct 3 ms 5468 KB Output is correct
24 Correct 3 ms 5604 KB Output is correct
25 Correct 4 ms 5468 KB Output is correct
26 Correct 3 ms 5468 KB Output is correct

Subtask #5
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5172 KB Output is correct
2 Correct 198 ms 43068 KB Output is correct
3 Correct 208 ms 57172 KB Output is correct
4 Correct 172 ms 41832 KB Output is correct
5 Correct 181 ms 43020 KB Output is correct
6 Correct 202 ms 44932 KB Output is correct
7 Correct 168 ms 43008 KB Output is correct
8 Correct 238 ms 56148 KB Output is correct
9 Correct 159 ms 43512 KB Output is correct
10 Correct 3 ms 5212 KB Output is correct
11 Correct 185 ms 43240 KB Output is correct
12 Correct 181 ms 56912 KB Output is correct
13 Correct 201 ms 41808 KB Output is correct
14 Correct 183 ms 43244 KB Output is correct
15 Correct 187 ms 45540 KB Output is correct
16 Correct 163 ms 43220 KB Output is correct
17 Correct 239 ms 52564 KB Output is correct
18 Correct 152 ms 43112 KB Output is correct
19 Correct 3 ms 5212 KB Output is correct
20 Correct 195 ms 43092 KB Output is correct
21 Correct 187 ms 56912 KB Output is correct
22 Correct 168 ms 41808 KB Output is correct
23 Correct 183 ms 43088 KB Output is correct
24 Correct 176 ms 42064 KB Output is correct
25 Correct 178 ms 43088 KB Output is correct
26 Correct 176 ms 41936 KB Output is correct
27 Correct 173 ms 42928 KB Output is correct
28 Correct 179 ms 45136 KB Output is correct
29 Correct 206 ms 43124 KB Output is correct
30 Correct 168 ms 42248 KB Output is correct
31 Correct 158 ms 43008 KB Output is correct
32 Correct 201 ms 52896 KB Output is correct
33 Correct 146 ms 43712 KB Output is correct

Subtask #6
44.0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5208 KB Output is correct
2 Correct 2 ms 5208 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 2 ms 5212 KB Output is correct
5 Correct 2 ms 5212 KB Output is correct
6 Correct 3 ms 5108 KB Output is correct
7 Correct 2 ms 5208 KB Output is correct
8 Correct 2 ms 5212 KB Output is correct
9 Correct 2 ms 5212 KB Output is correct
10 Correct 3 ms 5212 KB Output is correct
11 Correct 2 ms 5212 KB Output is correct
12 Correct 2 ms 5172 KB Output is correct
13 Correct 198 ms 43068 KB Output is correct
14 Correct 208 ms 57172 KB Output is correct
15 Correct 172 ms 41832 KB Output is correct
16 Correct 181 ms 43020 KB Output is correct
17 Correct 202 ms 44932 KB Output is correct
18 Correct 168 ms 43008 KB Output is correct
19 Correct 238 ms 56148 KB Output is correct
20 Correct 159 ms 43512 KB Output is correct
21 Correct 3 ms 5212 KB Output is correct
22 Correct 185 ms 43240 KB Output is correct
23 Correct 181 ms 56912 KB Output is correct
24 Correct 201 ms 41808 KB Output is correct
25 Correct 183 ms 43244 KB Output is correct
26 Correct 187 ms 45540 KB Output is correct
27 Correct 163 ms 43220 KB Output is correct
28 Correct 239 ms 52564 KB Output is correct
29 Correct 152 ms 43112 KB Output is correct
30 Correct 2 ms 5208 KB Output is correct
31 Correct 3 ms 5468 KB Output is correct
32 Correct 3 ms 5528 KB Output is correct
33 Correct 3 ms 5436 KB Output is correct
34 Correct 4 ms 5468 KB Output is correct
35 Correct 4 ms 5468 KB Output is correct
36 Correct 4 ms 5468 KB Output is correct
37 Correct 5 ms 5724 KB Output is correct
38 Correct 5 ms 5524 KB Output is correct
39 Correct 4 ms 5528 KB Output is correct
40 Correct 3 ms 5464 KB Output is correct
41 Correct 3 ms 5468 KB Output is correct
42 Correct 3 ms 5604 KB Output is correct
43 Correct 4 ms 5468 KB Output is correct
44 Correct 3 ms 5468 KB Output is correct
45 Correct 3 ms 5212 KB Output is correct
46 Correct 195 ms 43092 KB Output is correct
47 Correct 187 ms 56912 KB Output is correct
48 Correct 168 ms 41808 KB Output is correct
49 Correct 183 ms 43088 KB Output is correct
50 Correct 176 ms 42064 KB Output is correct
51 Correct 178 ms 43088 KB Output is correct
52 Correct 176 ms 41936 KB Output is correct
53 Correct 173 ms 42928 KB Output is correct
54 Correct 179 ms 45136 KB Output is correct
55 Correct 206 ms 43124 KB Output is correct
56 Correct 168 ms 42248 KB Output is correct
57 Correct 158 ms 43008 KB Output is correct
58 Correct 201 ms 52896 KB Output is correct
59 Correct 146 ms 43712 KB Output is correct
60 Correct 2 ms 5208 KB Output is correct
61 Correct 204 ms 45716 KB Output is correct
62 Correct 208 ms 58448 KB Output is correct
63 Correct 214 ms 44448 KB Output is correct
64 Correct 229 ms 45904 KB Output is correct
65 Correct 203 ms 44320 KB Output is correct
66 Correct 227 ms 45788 KB Output is correct
67 Correct 206 ms 44368 KB Output is correct
68 Correct 252 ms 45852 KB Output is correct
69 Correct 254 ms 47952 KB Output is correct
70 Correct 232 ms 45612 KB Output is correct
71 Correct 195 ms 45020 KB Output is correct
72 Correct 184 ms 46336 KB Output is correct
73 Correct 234 ms 55068 KB Output is correct
74 Correct 171 ms 47844 KB Output is correct