제출 #442256

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
442256		SorahISA	던전 (IOI21_dungeons)	C++17	0 / 100	96 ms	34892 KiB

dungeons

#include "dungeons.h"
#pragma GCC optimize("Ofast", "unroll-loops")
#include <bits/stdc++.h>
using namespace std;

#define int long long
// #define double long double
using pii = pair<int, int>;
template<typename T>
using Prior = std::priority_queue<T>;
template<typename T>
using prior = std::priority_queue<T, vector<T>, greater<T>>;

#define X first
#define Y second
#define eb emplace_back
#define pb pop_back
#define pf pop_front
#define ALL(x) begin(x), end(x)
#define RALL(x) rbegin(x), rend(x)

namespace {

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

// const int maxn = 4E5 + 5;
const int maxn = 5E4 + 5;
// const int w_lgmx = 19;
const int w_lgmx = 16;
const int l_lgmx = 23;

int N;
vector<int> S, P, W, L;

int win_anc[w_lgmx][maxn], win_sum[w_lgmx][maxn], win_val[w_lgmx][maxn];
int los_anc[l_lgmx][maxn], los_sum[l_lgmx][maxn];

} /// end of namespace

void init(int32_t _N, vector<int32_t> _S, vector<int32_t> _P, vector<int32_t> _W, vector<int32_t> _L) {
    N = _N;
    for (auto &x : _S) S.eb(x);
    for (auto &x : _P) P.eb(x);
    for (auto &x : _W) W.eb(x);
    for (auto &x : _L) L.eb(x);
    
    memset(win_anc, 0x00, sizeof(win_anc));
    memset(win_sum, 0x00, sizeof(win_sum));
    // memset(win_val, 0x00, sizeof(win_val));
    memset(los_anc, 0x00, sizeof(los_anc));
    memset(los_sum, 0x00, sizeof(los_sum));
    
    for (int i = 0; i < N; ++i) {
        win_anc[0][i] = W[i];
        win_sum[0][i] = S[i];
        // win_val[0][i] = S[i];
        los_anc[0][i] = L[i];
        los_sum[0][i] = P[i];
    }
    win_anc[0][N] = los_anc[0][N] = N;
    
    for (int lay = 1; lay < w_lgmx; ++lay) {
        for (int i = 0; i <= N; ++i) {
            int win_par = win_anc[lay-1][i];
            win_anc[lay][i] = win_anc[lay-1][win_par];
            win_sum[lay][i] = win_sum[lay-1][i] + win_sum[lay-1][win_par];
            // win_val[lay][i] = max(win_val[lay-1][i], win_val[lay-1][win_par]);
        }
    }
    
    for (int lay = 1; lay < l_lgmx; ++lay) {
        for (int i = 0; i <= N; ++i) {
            int los_par = los_anc[lay-1][i];
            los_anc[lay][i] = los_anc[lay-1][los_par];
            los_sum[lay][i] = los_sum[lay-1][i] + los_sum[lay-1][los_par];
        }
    }
}

int simulate(int32_t now, int32_t _Z) {
    /// s[i] = s[j] ///
    int Z = _Z;
    for (int lay = l_lgmx-1; lay >= 0; --lay) {
        if (los_anc[lay][now] != N and Z + los_sum[lay][now] < S[now]) {
            Z += los_sum[lay][now];
            now = los_anc[lay][now];
        }
        // cerr << "(Z, now): " << Z << "," << now << "\n";
    }
    if (Z < S[now]) Z += P[now], now = L[now];
    // while (now != N) {
        // if (Z >= S[now]) Z += S[now], now = W[now];
        // else             Z += P[now], now = L[now], assert(false);
    // }
    return Z + win_sum[w_lgmx-1][now];
}

컴파일 시 표준 에러 (stderr) 메시지

dungeons.cpp:35:51: warning: '{anonymous}::win_val' defined but not used [-Wunused-variable]
   35 | int win_anc[w_lgmx][maxn], win_sum[w_lgmx][maxn], win_val[w_lgmx][maxn];
      |                                                   ^~~~~~~

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