oj.uz

답안 #43133

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
43133 2018-03-09T10:14:48 Z aquablitz11 경주 (Race) (IOI11_race) C++14
21 / 100
 3000 ms 13112 KB 
// headers
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#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;
// types
template<class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
using dbl = double;
using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
template<class T> using MaxHeap = priority_queue<T>;
template<class T> using MinHeap = priority_queue<T, vector<T>, greater<T>>;
// loops
#define forx(i, x, y) for (int i = (x); i <= (y); ++i)
#define forn(i, n) for (int i = 0; i < (n); ++i)
#define for1(i, n) for (int i = 1; i <= (n); ++i)
#define rofx(i, x, y) for (int i = x; i >= y; --i)
#define rofn(i, n) for (int i = n-1; i >= 0; --i)
#define rof1(i, n) for (int i = n; i >= 1; --i)
#define fora(x, v) for (auto x : v)
// define shortcuts
#define all(x) begin(x), end(x)
#define pb push_back
#define eb emplace_back
#define F first
#define S second
#define X first
#define Y second
#define MP make_pair
#define MT make_tuple
// functions
template<class T> inline bool hasbit(T x, int i) { return x&(1<<i); }
template<class T> inline T togbit(T x, int i) { return x|(1<<i); }
template<class T> inline T setbit(T x, int i) { return x|(1<<i); }
template<class T> inline T rembit(T x, int i) { return x&~(1<<i); }
template<class T> inline bool setmax(T &a, const T &b) { return b > a ? a = b, true : false; }
template<class T> inline bool setmin(T &a, const T &b) { return b < a ? a = b, true : false; }
template<class T> int compress(vector<T> &v) { sort(all(v)); v.resize(unique(all(v))-v.begin()); return v.size(); }
// read functions
int read_int() { int x; scanf("%d", &x); return x; }
ll read_ll() { ll x; scanf("%" SCNd64, &x); return x; }
ull read_ull() { ull x; scanf("%" SCNu64, &x); return x; }
int read_dbl() { dbl x; scanf("%lf", &x); return x; }
void _R(int &x) { x = read_int(); }
void _R(ll &x) { x = read_ll(); }
void _R(dbl &x) { x = read_dbl(); }
void R() {}
template<class T, class... U> void R(T &head, U &... tail) { _R(head); R(tail...); }
// print functions
template<class T> void _W(const T &x) { cout << x; }
void _W(const int &x) { printf("%d", x); }
void _W(const ll &x) { printf("%" PRId64, x); }
void _W(const ull &x) { printf("%" PRIu64, x); }
void _W(const double &x) { printf("%.16f", x); }
void _W(const char &x) { putchar(x); }
void _W(const char *x) { printf("%s", x); }
template<class T> void _W(const vector<T> &x) { for (auto i = x.begin(); i != x.end(); _W(*i++)) if (i != x.cbegin()) putchar(' '); }
void W() {}
template<class T, class... U> void W(const T &head, const U &... tail) { _W(head); putchar(sizeof...(tail) ? ' ' : '\n'); W(tail...); }
// pseudo-random number generator
template<class T, T x1, T x2, T x3, int y1, int y2, int y3>
struct PRNG {
    using S = typename make_signed<T>::type;
    T s;
    PRNG(T _s = 0) : s(_s) {}
    T next() {
        T z = (s += x1);
        z = (z ^ (z >> y1)) * x2;
        z = (z ^ (z >> y2)) * x3;
        return z ^ (z >> y3);
    }
    T next(T n) { return next() % n; }
    S next(S l, S r) { return l + next(r - l + 1); }
    T operator()() { return next(); }
    T operator()(T n) { return next(n); }
    S operator()(S l, S r) { return next(l, r); }
    static T gen(T s) { return PRNG(s)(); }
    template<class U>
    void shuffle(U first, U last) {
        size_t n = last - first;
        for (size_t i = 0; i < n; i++) swap(first[i], first[next(i + 1)]);
    }
};
PRNG<uint32_t, 0x9E3779B1, 0x85EBCA6B, 0xC2B2AE35, 16, 13, 16> r32;
PRNG<uint64_t, 0x9E3779B97F4A7C15, 0xBF58476D1CE4E5B9, 0x94D049BB133111EB, 30, 27, 31> r64;
// program
int _main();
/*int main() {
    //ios::sync_with_stdio(false), cin.tie(0);
    //time_t begin = clock();
    int ret = _main();
    //time_t end = clock();
    //fprintf(stderr, "Program took %.3f seconds to compute\n", ((double)end-begin)/CLOCKS_PER_SEC);
    return ret;
}*/

/************************************************************
                CODE STARTS BELOW THIS POINT
************************************************************/

const int INF = 1e9;
const int N = 2e5+10;
const int K = 1e6+10;

int n, k;
vector<pii> G[N];
bool chk[N];

int sz[N];
void dfs(int u, int p) {
    sz[u] = 1;
    fora(v, G[u]) if (v.F != p && !chk[v.F])
        dfs(v.F, u), sz[u] += sz[v.F];
}

int cen, mns = INF;
void centroid(int u, int p, int s) {
    int z = sz[s]-sz[u];
    fora(v, G[u]) if (v.F != p && !chk[v.F]) {
        centroid(v.F, u, s);
        setmax(z, sz[v.F]);
    }
    if (z < mns) mns = z, cen = u;
}

int ans = INF;
int path[K], tst[K], tick;
void dfs1(int u, int p, int d, int l, bool fill) {
    if (d > k) return;
    if (!fill) {
        if (tst[k-d] == tick) setmin(ans, path[k-d]+l);
        if (d == k) setmin(ans, l);
    } else {
        if (tst[d] != tick) tst[d] = tick, path[d] = l;
        else setmin(path[d], l);
    }
    fora(v, G[u]) if (v.F != p && !chk[v.F]) dfs1(v.F, u, d+v.S, l+1, fill);
}

void process(int u) {
    ++tick;
    dfs(u, -1);
    mns = INF;
    centroid(u, -1, u);
    fora(v, G[u]) if (!chk[v.F]) dfs1(v.F, u, v.S, 1, 0), dfs1(v.F, u, v.S, 1, 1);
    chk[u] = true;
    fora(v, G[u]) if (!chk[v.F]) process(v.F);
}

int best_path(int _N, int _K, int H[][2], int L[]) {
    n = _N, k = _K;
    forn(i, n-1) {
        int u = H[i][0], v = H[i][1], w = L[i];
        G[u].eb(v, w);
        G[v].eb(u, w);
    }
    process(0);
    if (ans == INF)
        ans = -1;
    return ans;
}

int h[N][2], l[N];
int _main()
{
    int n, k;
    R(n, k);
    forn(i, n-1)
        R(h[i][0], h[i][1], l[i]);
    W(best_path(n, k, h, l));
    
    return 0;
}

Compilation message

race.cpp: In function 'll read_ll()':
race.cpp:46:42: warning: format '%ld' expects argument of type 'long int*', but argument 2 has type 'll* {aka long long int*}' [-Wformat=]
 ll read_ll() { ll x; scanf("%" SCNd64, &x); return x; }
                                        ~~^
race.cpp: In function 'ull read_ull()':
race.cpp:47:45: warning: format '%lu' expects argument of type 'long unsigned int*', but argument 2 has type 'ull* {aka long long unsigned int*}' [-Wformat=]
 ull read_ull() { ull x; scanf("%" SCNu64, &x); return x; }
                                           ~~^
race.cpp: In function 'void _W(const ll&)':
race.cpp:57:44: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'll {aka long long int}' [-Wformat=]
 void _W(const ll &x) { printf("%" PRId64, x); }
                                           ~^
race.cpp: In function 'void _W(const ull&)':
race.cpp:58:45: warning: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'ull {aka long long unsigned int}' [-Wformat=]
 void _W(const ull &x) { printf("%" PRIu64, x); }
                                            ~^
race.cpp: In function 'int read_int()':
race.cpp:45:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 int read_int() { int x; scanf("%d", &x); return x; }
                         ~~~~~^~~~~~~~~~
race.cpp: In function 'll read_ll()':
race.cpp:46:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 ll read_ll() { ll x; scanf("%" SCNd64, &x); return x; }
                      ~~~~~^~~~~~~~~~~~~~~~
race.cpp: In function 'ull read_ull()':
race.cpp:47:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 ull read_ull() { ull x; scanf("%" SCNu64, &x); return x; }
                         ~~~~~^~~~~~~~~~~~~~~~
race.cpp: In function 'int read_dbl()':
race.cpp:48:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 int read_dbl() { dbl x; scanf("%lf", &x); return x; }
                         ~~~~~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 4984 KB Output is correct
2 Correct 7 ms 5092 KB Output is correct
3 Correct 6 ms 5272 KB Output is correct
4 Correct 6 ms 5272 KB Output is correct
5 Correct 6 ms 5276 KB Output is correct
6 Correct 6 ms 5276 KB Output is correct
7 Correct 8 ms 5276 KB Output is correct
8 Correct 6 ms 5276 KB Output is correct
9 Correct 8 ms 5276 KB Output is correct
10 Correct 7 ms 5320 KB Output is correct
11 Correct 7 ms 5320 KB Output is correct
12 Correct 7 ms 5320 KB Output is correct
13 Correct 8 ms 5320 KB Output is correct
14 Correct 6 ms 5324 KB Output is correct
15 Correct 6 ms 5324 KB Output is correct
16 Correct 6 ms 5324 KB Output is correct
17 Correct 6 ms 5332 KB Output is correct
18 Correct 6 ms 5332 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 4984 KB Output is correct
2 Correct 7 ms 5092 KB Output is correct
3 Correct 6 ms 5272 KB Output is correct
4 Correct 6 ms 5272 KB Output is correct
5 Correct 6 ms 5276 KB Output is correct
6 Correct 6 ms 5276 KB Output is correct
7 Correct 8 ms 5276 KB Output is correct
8 Correct 6 ms 5276 KB Output is correct
9 Correct 8 ms 5276 KB Output is correct
10 Correct 7 ms 5320 KB Output is correct
11 Correct 7 ms 5320 KB Output is correct
12 Correct 7 ms 5320 KB Output is correct
13 Correct 8 ms 5320 KB Output is correct
14 Correct 6 ms 5324 KB Output is correct
15 Correct 6 ms 5324 KB Output is correct
16 Correct 6 ms 5324 KB Output is correct
17 Correct 6 ms 5332 KB Output is correct
18 Correct 6 ms 5332 KB Output is correct
19 Correct 6 ms 5332 KB Output is correct
20 Correct 6 ms 5336 KB Output is correct
21 Correct 7 ms 5336 KB Output is correct
22 Correct 14 ms 10596 KB Output is correct
23 Correct 13 ms 10596 KB Output is correct
24 Correct 14 ms 11236 KB Output is correct
25 Correct 14 ms 11236 KB Output is correct
26 Correct 10 ms 11236 KB Output is correct
27 Correct 7 ms 11236 KB Output is correct
28 Correct 9 ms 11236 KB Output is correct
29 Correct 10 ms 11236 KB Output is correct
30 Correct 11 ms 11236 KB Output is correct
31 Correct 13 ms 11236 KB Output is correct
32 Correct 12 ms 11236 KB Output is correct
33 Correct 15 ms 11492 KB Output is correct
34 Correct 17 ms 11492 KB Output is correct
35 Correct 18 ms 11748 KB Output is correct
36 Correct 24 ms 12644 KB Output is correct
37 Correct 17 ms 12644 KB Output is correct
38 Correct 13 ms 12644 KB Output is correct

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 4984 KB Output is correct
2 Correct 7 ms 5092 KB Output is correct
3 Correct 6 ms 5272 KB Output is correct
4 Correct 6 ms 5272 KB Output is correct
5 Correct 6 ms 5276 KB Output is correct
6 Correct 6 ms 5276 KB Output is correct
7 Correct 8 ms 5276 KB Output is correct
8 Correct 6 ms 5276 KB Output is correct
9 Correct 8 ms 5276 KB Output is correct
10 Correct 7 ms 5320 KB Output is correct
11 Correct 7 ms 5320 KB Output is correct
12 Correct 7 ms 5320 KB Output is correct
13 Correct 8 ms 5320 KB Output is correct
14 Correct 6 ms 5324 KB Output is correct
15 Correct 6 ms 5324 KB Output is correct
16 Correct 6 ms 5324 KB Output is correct
17 Correct 6 ms 5332 KB Output is correct
18 Correct 6 ms 5332 KB Output is correct
19 Correct 446 ms 12644 KB Output is correct
20 Correct 456 ms 12644 KB Output is correct
21 Correct 372 ms 12644 KB Output is correct
22 Correct 328 ms 12644 KB Output is correct
23 Correct 177 ms 12644 KB Output is correct
24 Correct 100 ms 12644 KB Output is correct
25 Execution timed out 3060 ms 13112 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 4984 KB Output is correct
2 Correct 7 ms 5092 KB Output is correct
3 Correct 6 ms 5272 KB Output is correct
4 Correct 6 ms 5272 KB Output is correct
5 Correct 6 ms 5276 KB Output is correct
6 Correct 6 ms 5276 KB Output is correct
7 Correct 8 ms 5276 KB Output is correct
8 Correct 6 ms 5276 KB Output is correct
9 Correct 8 ms 5276 KB Output is correct
10 Correct 7 ms 5320 KB Output is correct
11 Correct 7 ms 5320 KB Output is correct
12 Correct 7 ms 5320 KB Output is correct
13 Correct 8 ms 5320 KB Output is correct
14 Correct 6 ms 5324 KB Output is correct
15 Correct 6 ms 5324 KB Output is correct
16 Correct 6 ms 5324 KB Output is correct
17 Correct 6 ms 5332 KB Output is correct
18 Correct 6 ms 5332 KB Output is correct
19 Correct 6 ms 5332 KB Output is correct
20 Correct 6 ms 5336 KB Output is correct
21 Correct 7 ms 5336 KB Output is correct
22 Correct 14 ms 10596 KB Output is correct
23 Correct 13 ms 10596 KB Output is correct
24 Correct 14 ms 11236 KB Output is correct
25 Correct 14 ms 11236 KB Output is correct
26 Correct 10 ms 11236 KB Output is correct
27 Correct 7 ms 11236 KB Output is correct
28 Correct 9 ms 11236 KB Output is correct
29 Correct 10 ms 11236 KB Output is correct
30 Correct 11 ms 11236 KB Output is correct
31 Correct 13 ms 11236 KB Output is correct
32 Correct 12 ms 11236 KB Output is correct
33 Correct 15 ms 11492 KB Output is correct
34 Correct 17 ms 11492 KB Output is correct
35 Correct 18 ms 11748 KB Output is correct
36 Correct 24 ms 12644 KB Output is correct
37 Correct 17 ms 12644 KB Output is correct
38 Correct 13 ms 12644 KB Output is correct
39 Correct 446 ms 12644 KB Output is correct
40 Correct 456 ms 12644 KB Output is correct
41 Correct 372 ms 12644 KB Output is correct
42 Correct 328 ms 12644 KB Output is correct
43 Correct 177 ms 12644 KB Output is correct
44 Correct 100 ms 12644 KB Output is correct
45 Execution timed out 3060 ms 13112 KB Time limit exceeded
46 Halted 0 ms 0 KB -