C语言题解

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

void snake(int n,int m,int I,int J){
    int **matrix = (int **)malloc(n * sizeof(int *));
    for (int i = 0; i < n; i++) {
        matrix[i] = (int *)malloc(m * sizeof(int));
    }

    int top = 0, bottom = n - 1, left = 0, right = m - 1;
    int num = 1;

    while (top <= bottom && left <= right) {
        for (int i = left; i <= right; i++) {
            matrix[top][i] = num++;
        }
        top++;
        for (int i = top; i <= bottom; i++) {
            matrix[i][right] = num++;
        }
        right--;
        if (top <= bottom) {
            for (int i = right; i >= left; i--) {
                matrix[bottom][i] = num++;
            }
            bottom--;
        }
        if (left <= right) {
            for (int i = bottom; i >= top; i--) {
                matrix[i][left] = num++;
            }
            left++;
        }
    }
    printf("%d",matrix[I-1][J-1]);
    for (int i = 0; i < n; i++) {
        free(matrix[i]);
    }
    free(matrix);
}

int main(void){
    int n,i,j;
    scanf("%d%d%d",&n,&i,&j);
    snake(n,n,i,j);
    return 0;
}