제출 #768647

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
768647		boris_mihov	웜뱃 (IOI13_wombats)	C++17	27 / 100	534 ms	18204 KiB

wombats

#include "wombats.h"
#include <algorithm>
#include <iostream>
#include <numeric>
#include <vector>

typedef long long llong;
const int MAXR = 5000 + 10;
const int MAXC = 100 + 10;
const int INF  = 2e9;

int r, c;
int costLeft[MAXR][MAXC];
int costDown[MAXR][MAXC];
int dp[MAXC][MAXR][MAXC];
int prefix[MAXR];
int suffix[MAXR];

void calcDP()
{
    for (int end = 1 ; end <= c ; ++end)
    {
        int sum = 0;
        for (int col = end - 1 ; col >= 1 ; col--)
        {
            sum += costLeft[r][col];
            dp[end][r][col] = sum;
        }

        for (int col = end + 1 ; col <= c ; col++)
        {
            sum += costLeft[r][col - 1];
            dp[end][r][col] = sum;
        }

        for (int row = r - 1 ; row >= 1 ; --row)
        {
            prefix[0] = suffix[c + 1] = INF;
            for (int col = 1 ; col <= c ; ++col)
            {
                prefix[col] = std::min(prefix[col - 1] + costLeft[row][col - 1], dp[end][row + 1][col] + costDown[row][col]);
            }

            for (int col = c ; col >= 1 ; --col)
            {
                suffix[col] = std::min(suffix[col + 1] + costLeft[row][col], dp[end][row + 1][col] + costDown[row][col]);
            }

            for (int col = 1 ; col <= c ; ++col)
            {
                dp[end][row][col] = std::min(prefix[col], suffix[col]);
            }
        }
    }
}

void init(int R, int C, int H[5000][200], int V[5000][200]) 
{
    r = R;
    c = C;

    for (int i = 1 ; i <= r ; ++i)
    {
        for (int j = 1 ; j < c ; ++j)
        {
            costLeft[i][j] = H[i - 1][j - 1];
        }
    }

    for (int i = 1 ; i < r ; ++i)
    {
        for (int j = 1 ; j <= c ; ++j)
        {
            costDown[i][j] = V[i - 1][j - 1];
        }
    }

    calcDP();
}

void changeH(int P, int Q, int W)
{
    costLeft[P + 1][Q + 1] = W;
    calcDP();
}

void changeV(int P, int Q, int W) 
{
    costDown[P + 1][Q + 1] = W;
    calcDP();
}

int escape(int V1, int V2)
{
    V1++;
    V2++;
    return dp[V2][1][V1];
}

컴파일 시 표준 에러 (stderr) 메시지

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~

• Subtask 1: 9 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 16
• Subtask 4: 18 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24