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답안 #102248

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
102248 2019-03-23T21:02:39 Z Benq Designated Cities (JOI19_designated_cities) C++14
100 / 100
 1984 ms 86064 KB 
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/rope>

using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
 
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;

typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;

template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;

#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= (a); i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto& a : x)

#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound

#define sz(x) (int)x.size()
#define beg(x) x.begin()
#define en(x) x.end()
#define all(x) beg(x), en(x)
#define resz resize

const int MOD = 1000000007; // 998244353
const ll INF = 1e18;
const int MX = 200001;
const ld PI = 4*atan((ld)1);

template<class T> void ckmin(T &a, T b) { a = min(a, b); }
template<class T> void ckmax(T &a, T b) { a = max(a, b); }

template<class A, class B> A operator+=(A& l, const B& r) { return l = l+r; }
template<class A, class B> A operator-=(A& l, const B& r) { return l = l-r; }
template<class A, class B> A operator*=(A& l, const B& r) { return l = l*r; }
template<class A, class B> A operator/=(A& l, const B& r) { return l = l/r; }

namespace input {
    template<class T> void re(complex<T>& x);
    template<class T1, class T2> void re(pair<T1,T2>& p);
    template<class T> void re(vector<T>& a);
    template<class T, size_t SZ> void re(array<T,SZ>& a);

    template<class T> void re(T& x) { cin >> x; }
    void re(double& x) { string t; re(t); x = stod(t); }
    void re(ld& x) { string t; re(t); x = stold(t); }
    template<class Arg, class... Args> void re(Arg& first, Args&... rest) { 
        re(first); re(rest...); 
    }

    template<class T> void re(complex<T>& x) { T a,b; re(a,b); x = cd(a,b); }
    template<class T1, class T2> void re(pair<T1,T2>& p) { re(p.f,p.s); }
    template<class T> void re(vector<T>& a) { F0R(i,sz(a)) re(a[i]); }
    template<class T, size_t SZ> void re(array<T,SZ>& a) { F0R(i,SZ) re(a[i]); }
}

using namespace input;

namespace output {
    template<class T1, class T2> void pr(const pair<T1,T2>& x);
    template<class T, size_t SZ> void pr(const array<T,SZ>& x);
    template<class T> void pr(const vector<T>& x);
    template<class T> void pr(const set<T>& x);
    template<class T1, class T2> void pr(const map<T1,T2>& x);

    template<class T> void pr(const T& x) { cout << x; }
    template<class Arg, class... Args> void pr(const Arg& first, const Args&... rest) { 
        pr(first); pr(rest...); 
    }

    template<class T1, class T2> void pr(const pair<T1,T2>& x) { 
        pr("{",x.f,", ",x.s,"}"); 
    }
    template<class T> void prContain(const T& x) {
        pr("{");
        bool fst = 1; trav(a,x) pr(!fst?", ":"",a), fst = 0; 
        pr("}");
    }
    template<class T, size_t SZ> void pr(const array<T,SZ>& x) { prContain(x); }
    template<class T> void pr(const vector<T>& x) { prContain(x); }
    template<class T> void pr(const set<T>& x) { prContain(x); }
    template<class T1, class T2> void pr(const map<T1,T2>& x) { prContain(x); }
    
    void ps() { pr("\n"); } 
    template<class Arg, class... Args> void ps(const Arg& first, const Args&... rest) { 
        pr(first," "); ps(rest...); // print w/ spaces
    }
}

using namespace output;

namespace io {
    void setIn(string s) { freopen(s.c_str(),"r",stdin); }
    void setOut(string s) { freopen(s.c_str(),"w",stdout); }
    void setIO(string s = "") {
        ios_base::sync_with_stdio(0); cin.tie(0); // fast I/O
        if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO
    }
}

using namespace io;

template<class T> T invGeneral(T a, T b) {
    a %= b; if (a == 0) return b == 1 ? 0 : -1;
    T x = invGeneral(b,a); 
    return x == -1 ? -1 : ((1-(ll)b*x)/a+b)%b;
}

template<class T> struct modInt {
    T val;
    T mod = 0;
    // static const T mod = MOD;

    void normalize() {
        if (mod == 0) return;
        val %= mod; if (val < 0) val += mod;
    }
    modInt(T v = 0, T m = 0) : val(v), mod(m) { normalize(); }
    // modInt(T v = 0, T m = 0) : val(v) { normalize(); }

    explicit operator T() const { return val; }
    friend ostream& operator<<(ostream& os, const modInt& a) { return os << a.val; }
    friend bool operator==(const modInt& a, const modInt& b) { return a.val == b.val; }
    friend bool operator!=(const modInt& a, const modInt& b) { return !(a == b); }

    friend void check(modInt& a, modInt& b) { // make sure all operations are valid
        // comment out if mod is static const
        if (a.mod > 0 && b.mod > 0) { assert(a.mod == b.mod); return; }
        T mod = max(a.mod,b.mod); if (mod == 0) mod = MOD;
        if (a.mod != mod) { a.mod = mod; a.normalize(); }
        if (b.mod != mod) { b.mod = mod; b.normalize(); }
    }
    friend modInt operator+(modInt a, modInt b) {
        check(a,b); a.val += (T)b;
        if (a.val >= a.mod) a.val -= a.mod;
        return a;
    }
    friend modInt operator-(modInt a, modInt b) {
        check(a,b); a.val -= (T)b; 
        if (a.val < 0) a.val += a.mod; 
        return a;
    }
    friend modInt operator-(const modInt& a) { return modInt(0)-a; }

    friend modInt operator*(modInt a, modInt b) {
        check(a,b); a.val = (ll)a.val*(T)b%a.mod; return a;
    }
    friend modInt exp(modInt a, ll p) {
        modInt ans(1,a.mod);
        for (; p; p /= 2, a *= a) if (p&1) ans *= a;
        return ans;
    }
    friend modInt inv(const modInt& a) {
        return {invGeneral(a.val,a.mod),a.mod};
        // return exp(b,b.mod-2) if prime
    }
    friend modInt operator/(modInt a, modInt b) { 
        check(a,b); return a*inv(b); 
    }
};

typedef modInt<int> mi;
typedef pair<mi,mi> pmi;
typedef vector<mi> vmi;
typedef vector<pmi> vpmi;

vector<array<int,3>> adj[MX];
int N,Q;
ll tot, ans1[MX], ans[MX];

template<int SZ> struct CentroidDecomp {
    bool done[SZ];
    int sub[SZ], par[SZ];
    vl dist[SZ];

    void dfs (int no) {
        sub[no] = 1;
        trav(i,adj[no]) if (!done[i[0]] && i[0] != par[no]) {
            par[i[0]] = no;
            dfs(i[0]);
            sub[no] += sub[i[0]];
        }
    }

    int getCentroid(int x) {
        par[x] = 0; dfs(x);
        int sz = sub[x];
        while (1) {
            pi mx = {0,0};
            trav(i,adj[x]) if (!done[i[0]] && i[0] != par[x]) ckmax(mx,{sub[i[0]],i[0]});
            if (mx.f*2 > sz) x = mx.s;
            else return x;
        }
    }

    void comb(vl& a, vl& b) {
        if (sz(a) < sz(b)) swap(a,b);
        if (a.back() > b.back()) swap(a.back(),b.back());
        a.insert(a.end(),all(b)); b.clear();
    }
    void genDist(int par, int no, int d) {
        dist[no] = {0};
        trav(i,adj[no]) if (!done[i[0]] && i[0] != par) {
            genDist(no,i[0],i[1]);
            comb(dist[no],dist[i[0]]);
        }
        dist[no].back() += d;
    }

    void init(int x) { // call init(1) to start
        x = getCentroid(x); done[x] = 1;
        vl posi; dist[x] = {0}; posi.pb(0);
        
        pl bes = {0,-1};
        trav(i,adj[x]) if (!done[i[0]]) {
            genDist(x,i[0],i[1]);
            // ps("HUH",i[0],dist[i[0]]);
            auto t = dist[i[0]].back();
            if (t > bes.f) swap(bes.f,t);
            if (t > bes.s) swap(bes.s,t);
            posi.insert(posi.end(),all(dist[i[0]]));
        }
        
        if (sz(posi) <= 1) return;
        ll ans2 = bes.f+bes.s;
        posi.erase(find(all(posi),bes.f));
        posi.erase(find(all(posi),bes.s));
        sort(all(posi)); reverse(all(posi));
        F0R(i,sz(posi)+1) {
            ckmax(ans[i+2],ans1[x]+ans2);
            if (i == sz(posi)) break;
            ans2 += posi[i];
        }
        trav(i,adj[x]) if (!done[i[0]]) init(i[0]);
    }
};

CentroidDecomp<MX> C;

void dfs1(int a, int b) {
    trav(t,adj[a]) if (t[0] != b) {
        ans1[1] += t[2];
        dfs1(t[0],a);
    }
}

void dfs2(int a, int b) {
    trav(t,adj[a]) if (t[0] != b) {
        ans1[t[0]] = ans1[a]+t[1]-t[2];
        dfs2(t[0],a);
    }
    
}

void init() {
    setIO(); re(N);
    F0R(i,N-1) {
        int A,B,C,D; re(A,B,C,D);
        tot += C+D;
        adj[A].pb({B,C,D}), adj[B].pb({A,D,C});
    }
    dfs1(1,0); dfs2(1,0);
    FOR(i,1,N+1) {
        // ps(i,ans1[i]);
        ckmax(ans[1],ans1[i]);
    }
}

int main() {
    init();
    C.init(1);
    int Q; re(Q); 
    F0R(i,Q) {
        int e; re(e);
        ps(tot-ans[e]);
    }
}

/* stuff you should look for
    * int overflow, array bounds
    * special cases (n=1?), set tle
    * do smth instead of nothing and stay organized
*/

Compilation message

designated_cities.cpp: In function 'void io::setIn(std::__cxx11::string)':
designated_cities.cpp:117:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     void setIn(string s) { freopen(s.c_str(),"r",stdin); }
                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
designated_cities.cpp: In function 'void io::setOut(std::__cxx11::string)':
designated_cities.cpp:118:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     void setOut(string s) { freopen(s.c_str(),"w",stdout); }
                             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 12 ms 9728 KB Output is correct
3 Correct 12 ms 9728 KB Output is correct
4 Correct 11 ms 9728 KB Output is correct
5 Correct 11 ms 9728 KB Output is correct
6 Correct 11 ms 9728 KB Output is correct
7 Correct 12 ms 9728 KB Output is correct
8 Correct 14 ms 9728 KB Output is correct
9 Correct 14 ms 9856 KB Output is correct
10 Correct 12 ms 9700 KB Output is correct
11 Correct 14 ms 9728 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 1251 ms 74964 KB Output is correct
3 Correct 1765 ms 82848 KB Output is correct
4 Correct 1275 ms 83708 KB Output is correct
5 Correct 542 ms 40708 KB Output is correct
6 Correct 1508 ms 76928 KB Output is correct
7 Correct 444 ms 37724 KB Output is correct
8 Correct 1984 ms 81092 KB Output is correct
9 Correct 315 ms 37668 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9728 KB Output is correct
2 Correct 1456 ms 80248 KB Output is correct
3 Correct 1913 ms 82812 KB Output is correct
4 Correct 1551 ms 85112 KB Output is correct
5 Correct 530 ms 41032 KB Output is correct
6 Correct 1617 ms 75416 KB Output is correct
7 Correct 408 ms 38408 KB Output is correct
8 Correct 1769 ms 74308 KB Output is correct
9 Correct 305 ms 37244 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 12 ms 9728 KB Output is correct
3 Correct 12 ms 9728 KB Output is correct
4 Correct 11 ms 9728 KB Output is correct
5 Correct 11 ms 9728 KB Output is correct
6 Correct 11 ms 9728 KB Output is correct
7 Correct 12 ms 9728 KB Output is correct
8 Correct 14 ms 9728 KB Output is correct
9 Correct 14 ms 9856 KB Output is correct
10 Correct 12 ms 9700 KB Output is correct
11 Correct 14 ms 9728 KB Output is correct
12 Correct 13 ms 9728 KB Output is correct
13 Correct 16 ms 10212 KB Output is correct
14 Correct 16 ms 10368 KB Output is correct
15 Correct 16 ms 10240 KB Output is correct
16 Correct 20 ms 10368 KB Output is correct
17 Correct 16 ms 10240 KB Output is correct
18 Correct 15 ms 10240 KB Output is correct
19 Correct 15 ms 10240 KB Output is correct
20 Correct 13 ms 10112 KB Output is correct
21 Correct 16 ms 10240 KB Output is correct
22 Correct 15 ms 10240 KB Output is correct
23 Correct 14 ms 10240 KB Output is correct
24 Correct 14 ms 10112 KB Output is correct
25 Correct 17 ms 10368 KB Output is correct
26 Correct 17 ms 10112 KB Output is correct

Subtask #5
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 1251 ms 74964 KB Output is correct
3 Correct 1765 ms 82848 KB Output is correct
4 Correct 1275 ms 83708 KB Output is correct
5 Correct 542 ms 40708 KB Output is correct
6 Correct 1508 ms 76928 KB Output is correct
7 Correct 444 ms 37724 KB Output is correct
8 Correct 1984 ms 81092 KB Output is correct
9 Correct 315 ms 37668 KB Output is correct
10 Correct 11 ms 9728 KB Output is correct
11 Correct 1456 ms 80248 KB Output is correct
12 Correct 1913 ms 82812 KB Output is correct
13 Correct 1551 ms 85112 KB Output is correct
14 Correct 530 ms 41032 KB Output is correct
15 Correct 1617 ms 75416 KB Output is correct
16 Correct 408 ms 38408 KB Output is correct
17 Correct 1769 ms 74308 KB Output is correct
18 Correct 305 ms 37244 KB Output is correct
19 Correct 12 ms 9728 KB Output is correct
20 Correct 1371 ms 84104 KB Output is correct
21 Correct 1957 ms 82908 KB Output is correct
22 Correct 1432 ms 83548 KB Output is correct
23 Correct 1370 ms 84660 KB Output is correct
24 Correct 1279 ms 85876 KB Output is correct
25 Correct 1332 ms 83904 KB Output is correct
26 Correct 1602 ms 83644 KB Output is correct
27 Correct 579 ms 41200 KB Output is correct
28 Correct 1651 ms 76980 KB Output is correct
29 Correct 1307 ms 80460 KB Output is correct
30 Correct 1115 ms 74824 KB Output is correct
31 Correct 442 ms 37768 KB Output is correct
32 Correct 1765 ms 75560 KB Output is correct
33 Correct 300 ms 37668 KB Output is correct

Subtask #6
44.0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 12 ms 9728 KB Output is correct
3 Correct 12 ms 9728 KB Output is correct
4 Correct 11 ms 9728 KB Output is correct
5 Correct 11 ms 9728 KB Output is correct
6 Correct 11 ms 9728 KB Output is correct
7 Correct 12 ms 9728 KB Output is correct
8 Correct 14 ms 9728 KB Output is correct
9 Correct 14 ms 9856 KB Output is correct
10 Correct 12 ms 9700 KB Output is correct
11 Correct 14 ms 9728 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 1251 ms 74964 KB Output is correct
14 Correct 1765 ms 82848 KB Output is correct
15 Correct 1275 ms 83708 KB Output is correct
16 Correct 542 ms 40708 KB Output is correct
17 Correct 1508 ms 76928 KB Output is correct
18 Correct 444 ms 37724 KB Output is correct
19 Correct 1984 ms 81092 KB Output is correct
20 Correct 315 ms 37668 KB Output is correct
21 Correct 11 ms 9728 KB Output is correct
22 Correct 1456 ms 80248 KB Output is correct
23 Correct 1913 ms 82812 KB Output is correct
24 Correct 1551 ms 85112 KB Output is correct
25 Correct 530 ms 41032 KB Output is correct
26 Correct 1617 ms 75416 KB Output is correct
27 Correct 408 ms 38408 KB Output is correct
28 Correct 1769 ms 74308 KB Output is correct
29 Correct 305 ms 37244 KB Output is correct
30 Correct 13 ms 9728 KB Output is correct
31 Correct 16 ms 10212 KB Output is correct
32 Correct 16 ms 10368 KB Output is correct
33 Correct 16 ms 10240 KB Output is correct
34 Correct 20 ms 10368 KB Output is correct
35 Correct 16 ms 10240 KB Output is correct
36 Correct 15 ms 10240 KB Output is correct
37 Correct 15 ms 10240 KB Output is correct
38 Correct 13 ms 10112 KB Output is correct
39 Correct 16 ms 10240 KB Output is correct
40 Correct 15 ms 10240 KB Output is correct
41 Correct 14 ms 10240 KB Output is correct
42 Correct 14 ms 10112 KB Output is correct
43 Correct 17 ms 10368 KB Output is correct
44 Correct 17 ms 10112 KB Output is correct
45 Correct 12 ms 9728 KB Output is correct
46 Correct 1371 ms 84104 KB Output is correct
47 Correct 1957 ms 82908 KB Output is correct
48 Correct 1432 ms 83548 KB Output is correct
49 Correct 1370 ms 84660 KB Output is correct
50 Correct 1279 ms 85876 KB Output is correct
51 Correct 1332 ms 83904 KB Output is correct
52 Correct 1602 ms 83644 KB Output is correct
53 Correct 579 ms 41200 KB Output is correct
54 Correct 1651 ms 76980 KB Output is correct
55 Correct 1307 ms 80460 KB Output is correct
56 Correct 1115 ms 74824 KB Output is correct
57 Correct 442 ms 37768 KB Output is correct
58 Correct 1765 ms 75560 KB Output is correct
59 Correct 300 ms 37668 KB Output is correct
60 Correct 10 ms 9728 KB Output is correct
61 Correct 1429 ms 86064 KB Output is correct
62 Correct 1846 ms 83388 KB Output is correct
63 Correct 1330 ms 83208 KB Output is correct
64 Correct 1241 ms 81756 KB Output is correct
65 Correct 1273 ms 83552 KB Output is correct
66 Correct 1313 ms 85048 KB Output is correct
67 Correct 1430 ms 85152 KB Output is correct
68 Correct 656 ms 43112 KB Output is correct
69 Correct 1729 ms 77224 KB Output is correct
70 Correct 1362 ms 83596 KB Output is correct
71 Correct 1239 ms 75508 KB Output is correct
72 Correct 482 ms 39520 KB Output is correct
73 Correct 1908 ms 76352 KB Output is correct
74 Correct 375 ms 40328 KB Output is correct