제출 #1021491

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1021491		Shadxwed	Awesome Arrowland Adventure (eJOI19_adventure)	C11	0 / 100	1 ms	416 KiB

adventure

#include <stdio.h>
#include <stdlib.h>

const int inf = 500*500*3+2;

void f(char *arr, int *res, int posy, int posx, int maxx) {
    static int t;
    static char t2;
    static int t3;
    t3 = res[posy*(maxx+2)+posx];
    if(arr[posy*(maxx+2)+posx+1] != 'X') {
        t = res[posy*(maxx+2)+posx+1];
        t2 = arr[posy*(maxx+2)+posx+1];
        if(t2 == 'W' && t3 < t) {
            res[posy*(maxx+2)+posx+1] = t3;
            f(arr, res, posy, posx+1, maxx);
        } else if(t2 == 'N' && res[posy*(maxx+2)+posx]+3 < t) {
            res[posy*(maxx+2)+posx+1] = t3+3;
            f(arr, res, posy, posx+1, maxx);
        } else if(t2 == 'E' && t3 < t) {
            res[posy*(maxx+2)+posx+1] = t3+2;
            f(arr, res, posy, posx+1, maxx);
        } else if(t2 == 'S' && t3+1 < t) {
            res[posy*(maxx+2)+posx+1] = t3+1;
            f(arr, res, posy, posx+1, maxx);
        }
    }
    if(arr[posy*(maxx+2)+posx-1] != 'X') {
        t = res[posy*(maxx+2)+posx-1];
        t2 = arr[posy*(maxx+2)+posx-1];
        if(t2 == 'E' && t3 < t) {
            res[posy*(maxx+2)+posx-1] = t3;
        } else if(t2 == 'S' && t3+3 < t) {
            res[posy*(maxx+2)+posx-1] = t3+3;
        } else if(t2 == 'W' && t3+2 < t) {
            res[posy*(maxx+2)+posx-1] = t3+2;
        } else if(t2 == 'N' && t3+1 < t) {
            res[posy*(maxx+2)+posx-1] = t3+1;
        }
        f(arr, res, posy, posx-1, maxx);
    }
    if(arr[(posy+1)*(maxx+2)+posx] != 'X') {
        t = res[(posy+1)*(maxx+2)+posx];
        t2 = arr[(posy+1)*(maxx+2)+posx];
        if(t2== 'N' && t3 < t) {
            res[(posy+1)*(maxx+2)+posx] = t3;
        f(arr, res, posy+1, posx, maxx);
        } else if(t2 == 'E' && t3+3 < t) {
            res[(posy+1)*(maxx+2)+posx] = t3+3;
        f(arr, res, posy+1, posx, maxx);
        } else if(t2 == 'S' && t3+2 < t) {
            res[(posy+1)*(maxx+2)+posx] = t3+2;
        f(arr, res, posy+1, posx, maxx);
        } else if(t2 == 'W' && t3+1 < t) {
            res[(posy+1)*(maxx+2)+posx] = t3+1;
        f(arr, res, posy+1, posx, maxx);
        }
    }
    if(arr[(posy-1)*(maxx+2)+posx] != 'X') {
        t = res[(posy-1)*(maxx+2)+posx];
        t2 = arr[(posy-1)*(maxx+2)+posx];
        if(t2 == 'S' && t3 < t) {
            res[(posy-1)*(maxx+2)+posx] = t3;
        f(arr, res, posy-1, posx, maxx);
        } else if(t2 == 'W' && t3 < t) {
            res[(posy-1)*(maxx+2)+posx] = t3+3;
        f(arr, res, posy-1, posx, maxx);
        } else if(t2 == 'N' && t3+2 < t) {
            res[(posy-1)*(maxx+2)+posx] = t3+2;
        f(arr, res, posy-1, posx, maxx);
        } else if(t2 == 'E' && t3+1 < t) {
            res[(posy-1)*(maxx+2)+posx] = t3+1;
        f(arr, res, posy-1, posx, maxx);
        }
    }
}

int main()
{
    int n, m;
    scanf("%d %d ", &n, &m);
    char *arr = malloc((n+2)*(m+2) * sizeof(char));
    int *res = malloc(n*m * sizeof(int));
    for(int i = 1; i < n+1; i++) {
        for(int j = 1; j < m+1; j++) {
            scanf("%c", &arr[i*(m+2)+j]);
        }
        if(i+1<n+1) scanf(" ");
    }
    for(int i = 0; i < n+2; i++) {
        arr[0*(m+2)+i] = 'X';
        arr[i*(m+2)+0] = 'X';
        arr[((n+2)-1)*(m+2)+i] = 'X';
        arr[i*(m+2)+(m+2)-1] = 'X';
    }
    for(int i = 0; i <= n; i++) {
        for(int j = 0; j < m; j++) {
            res[i*m+j] = inf;
        }
    }
    res[(n-1)*m+m-1] = 0;
    f(arr, res, n, m, m);
    n = res[1*(m+2)+1];
    printf("%d", n<inf?n:-1); //res
    free(arr);
    free(res);
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

adventure.c: In function 'main':
adventure.c:81:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |     scanf("%d %d ", &n, &m);
      |     ^~~~~~~~~~~~~~~~~~~~~~~
adventure.c:86:13: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |             scanf("%c", &arr[i*(m+2)+j]);
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
adventure.c:88:21: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   88 |         if(i+1<n+1) scanf(" ");
      |                     ^~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 12
• Subtask 4: 0 / 16
• Subtask 5: 0 / 50