답안 #52704

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
52704 2018-06-26T11:46:38 Z aquablitz11 Regions (IOI09_regions) C++14
95 / 100
7367 ms 31352 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>;
using pli = pair<ll, int>;
using piipi = pair<pii, int>;
using pipii = pair<int, pii>;
using plpii = pair<ll, pii>;
using ppii = pair<pii, pii>;
// 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; }
dbl 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 N = 200010;
const int K = 25010;
const int SN = 450;
 
int n, k, q, sn;
vector<int> mem[K], memp[K], G[N];
int pre[N], post[N], reg[N], tick, par[N], seq[N];
int spi[K], qs[N], prec[SN][K];

void dfs(int u)
{
    pre[u] = ++tick;
    seq[tick] = u;
    memp[reg[u]].pb(tick);
    fora(v, G[u]) dfs(v);
    post[u] = tick;
}

int _main()
{
    R(n, k, q);
    sn = sqrt(n);
    //sn = 0;

    R(reg[1]);
    mem[reg[1]].pb(1);
    forx(i, 2, n) {
        R(par[i], reg[i]);
        mem[reg[i]].pb(i);
        G[par[i]].pb(i);
    }
    int cntsp = 0;
    for1(i, k) if (mem[i].size() >= sn)
        spi[i] = ++cntsp;
    assert(cntsp <= 502);
    dfs(1);
    for1(i, k) if (spi[i]) {
        for1(j, n) qs[j] = 0;
        for1(u, n) if (reg[u] == i) {
            ++qs[pre[u]];
            --qs[post[u]+1];
        }
        for1(j, n) {
            qs[j] += qs[j-1];
            prec[spi[i]][reg[seq[j]]] += qs[j];
        }
    }

    while (q--) {
        int r1, r2;
        R(r1, r2);
        int ans = 0;
        if (spi[r1]) ans = prec[spi[r1]][r2];
        else fora(u, mem[r1]) {
            auto lb = lower_bound(all(memp[r2]), pre[u]);
            auto ub = upper_bound(all(memp[r2]), post[u]);
            ans += ub-lb;
        }
        W(ans);
        fflush(stdout);
    }

    return 0;
}

Compilation message

regions.cpp: In function 'll read_ll()':
regions.cpp:49:42: 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; }
                                        ~~^
regions.cpp: In function 'ull read_ull()':
regions.cpp:50:45: 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; }
                                           ~~^
regions.cpp: In function 'void _W(const ll&)':
regions.cpp:60:44: 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); }
                                           ~^
regions.cpp: In function 'void _W(const ull&)':
regions.cpp:61:45: 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); }
                                            ~^
regions.cpp: In function 'int _main()':
regions.cpp:141:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for1(i, k) if (mem[i].size() >= sn)
                    ~~~~~~~~~~~~~~^~~~~
regions.cpp: In function 'int read_int()':
regions.cpp:48:30: 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; }
                         ~~~~~^~~~~~~~~~
regions.cpp: In function 'll read_ll()':
regions.cpp:49:27: 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; }
                      ~~~~~^~~~~~~~~~~~~~~~
regions.cpp: In function 'ull read_ull()':
regions.cpp:50:30: 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; }
                         ~~~~~^~~~~~~~~~~~~~~~
regions.cpp: In function 'dbl read_dbl()':
regions.cpp:51:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 dbl read_dbl() { dbl x; scanf("%lf", &x); return x; }
                         ~~~~~^~~~~~~~~~~
# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 6136 KB Output is correct
2 Correct 7 ms 6324 KB Output is correct
3 Correct 10 ms 6384 KB Output is correct
4 Correct 9 ms 6384 KB Output is correct
5 Correct 16 ms 6384 KB Output is correct
6 Correct 25 ms 6384 KB Output is correct
7 Correct 32 ms 6532 KB Output is correct
8 Correct 21 ms 6580 KB Output is correct
9 Correct 50 ms 6836 KB Output is correct
10 Correct 84 ms 7092 KB Output is correct
11 Correct 169 ms 7348 KB Output is correct
12 Correct 174 ms 7860 KB Output is correct
13 Correct 208 ms 7860 KB Output is correct
14 Correct 323 ms 8372 KB Output is correct
15 Correct 352 ms 10420 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 2273 ms 11828 KB Output is correct
2 Correct 2729 ms 11828 KB Output is correct
3 Correct 3503 ms 13368 KB Output is correct
4 Correct 337 ms 13368 KB Output is correct
5 Correct 405 ms 13368 KB Output is correct
6 Correct 514 ms 13368 KB Output is correct
7 Correct 1254 ms 13372 KB Output is correct
8 Correct 1167 ms 19900 KB Output is correct
9 Correct 3274 ms 19900 KB Output is correct
10 Correct 3530 ms 31352 KB Output is correct
11 Execution timed out 7367 ms 31352 KB Time limit exceeded (wall clock)
12 Correct 2325 ms 31352 KB Output is correct
13 Correct 3008 ms 31352 KB Output is correct
14 Correct 3007 ms 31352 KB Output is correct
15 Correct 4555 ms 31352 KB Output is correct
16 Correct 3967 ms 31352 KB Output is correct
17 Correct 4045 ms 31352 KB Output is correct