제출 #815170

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
815170		eltu0815	던전 (IOI21_dungeons)	C++17	89 / 100	7155 ms	1794324 KiB

dungeons

#include "dungeons.h"
#include <bits/stdc++.h>

#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

using namespace std;

typedef long long ll;

int N;
const int MX = 25;
int pos[MX][400001][9];
ll sum[MX][400001][9], mx[MX][400001][9];

int tmp1[400001];
ll tmp2[400001], tmp3[400001];

void init(int n, std::vector<int> S, std::vector<int> P, std::vector<int> W, std::vector<int> L) {
    N = n;
    for(int j = 0; j < MX; ++j) {
        for(int i = 0; i < N; ++i) {
            pos[j][i][0] = (1 << j) <= S[i] ? L[i] : W[i];
            sum[j][i][0] = (1 << j) <= S[i] ? P[i] : S[i];
            mx[j][i][0] = (1 << j) <= S[i] ? -S[i] : -(ll)(1e16);
        }
        pos[j][N][0] = N, sum[j][N][0] = 0;
    }
    for(int k = 0; k < MX; ++k) for(int j = 1; j <= 8; ++j) {
        for(int i = 0; i <= N; ++i) {
            pos[k][i][j] = pos[k][pos[k][i][j - 1]][j - 1];
            sum[k][i][j] = sum[k][pos[k][i][j - 1]][j - 1] + sum[k][i][j - 1];
            mx[k][i][j] = max(mx[k][i][j - 1], sum[k][i][j - 1] + mx[k][pos[k][i][j - 1]][j - 1]);
            tmp1[i] = pos[k][i][j], tmp2[i] = sum[k][i][j], tmp3[i] = mx[k][i][j];
        }
        
        for(int i = 0; i <= N; ++i) {
            mx[k][i][j] = max(tmp3[i], tmp2[i] + tmp3[tmp1[i]]);
            sum[k][i][j] = tmp2[tmp1[i]] + tmp2[i];
            pos[k][i][j] = tmp1[tmp1[i]];
        }
        for(int i = 0; i <= N; ++i) tmp1[i] = pos[k][i][j], tmp2[i] = sum[k][i][j], tmp3[i] = mx[k][i][j];        
        
        for(int i = 0; i <= N; ++i) {
            mx[k][i][j] = max(tmp3[i], tmp2[i] + tmp3[tmp1[i]]);
            sum[k][i][j] = tmp2[tmp1[i]] + tmp2[i];
            pos[k][i][j] = tmp1[tmp1[i]];
        }
    }
	return;
}

long long simulate(int x, int z) {
    ll ans = z;
    for(int k = 0; k < MX - 1; ++k) {
        for(int j = min(8, k); j >= 0; --j) for(int t = 0; t < 7; ++t) {
            if(!(pos[k][x][j] == N || mx[k][x][j] + ans >= 0ll)) ans += sum[k][x][j], x = pos[k][x][j];
            else break;
        }
        if(ans < (1 << k)) ans += sum[k][x][0], x = pos[k][x][0];
        if(x == N) return ans;
    }
    
    for(int j = 8; j >= 0; --j) {
        for(int t = 0; t < 7; ++t) {
            if(pos[t - 1][x][j] != N) ans += sum[MX - 1][x][j], x = pos[MX - 1][x][j];
            else break;
        }
    }
    ans += sum[MX - 1][x][0], x = pos[MX - 1][x][0];
	return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

dungeons.cpp: In function 'long long int simulate(int, int)':
dungeons.cpp:66:25: warning: array subscript -1 is below array bounds of 'int [25][400001][9]' [-Warray-bounds]
   66 |             if(pos[t - 1][x][j] != N) ans += sum[MX - 1][x][j], x = pos[MX - 1][x][j];
      |                ~~~~~~~~~^
dungeons.cpp:13:5: note: while referencing 'pos'
   13 | int pos[MX][400001][9];
      |     ^~~

• Subtask 1: 11 / 11
• Subtask 2: 26 / 26
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 27 / 27
• Subtask 6: 0 / 11