/in/foo.c:1:3: error: invalid preprocessing directive #�
 # 定义常量
   ^
/in/foo.c:2:1: warning: data definition has no type or storage class
 N = 1005
 ^
/in/foo.c:2:1: warning: type defaults to 'int' in declaration of 'N' [-Wimplicit-int]
/in/foo.c:3:1: error: expected ',' or ';' before 'dx'
 dx = [1, 0, -1, 0]  # 上下左右四个方向
 ^~
/in/foo.c:3:21: error: stray '#' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                     ^
/in/foo.c:3:23: error: stray '\344' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                       ^
/in/foo.c:3:24: error: stray '\270' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                        ^
/in/foo.c:3:25: error: stray '\212' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                         ^
/in/foo.c:3:26: error: stray '\344' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                          ^
/in/foo.c:3:27: error: stray '\270' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                           ^
/in/foo.c:3:28: error: stray '\213' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                            ^
/in/foo.c:3:29: error: stray '\345' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                             ^
/in/foo.c:3:30: error: stray '\267' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                              ^
/in/foo.c:3:31: error: stray '\246' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                               ^
/in/foo.c:3:32: error: stray '\345' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                ^
/in/foo.c:3:33: error: stray '\217' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                 ^
/in/foo.c:3:34: error: stray '\263' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                  ^
/in/foo.c:3:35: error: stray '\345' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                   ^
/in/foo.c:3:36: error: stray '\233' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                    ^
/in/foo.c:3:37: error: stray '\233' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                     ^
/in/foo.c:3:38: error: stray '\344' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                      ^
/in/foo.c:3:39: error: stray '\270' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                       ^
/in/foo.c:3:40: error: stray '\252' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                        ^
/in/foo.c:3:41: error: stray '\346' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                         ^
/in/foo.c:3:42: error: stray '\226' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                          ^
/in/foo.c:3:43: error: stray '\271' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                           ^
/in/foo.c:3:44: error: stray '\345' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                            ^
/in/foo.c:3:45: error: stray '\220' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                             ^
/in/foo.c:3:46: error: stray '\221' in program
 dx = [1, 0, -1, 0]  # 上下左右四个方向
                                              ^
/in/foo.c:5:34: error: stray '#' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                  ^
/in/foo.c:5:36: error: stray '\345' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                    ^
/in/foo.c:5:37: error: stray '\234' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                     ^
/in/foo.c:5:38: error: stray '\260' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                      ^
/in/foo.c:5:39: error: stray '\345' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                       ^
/in/foo.c:5:40: error: stray '\233' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                        ^
/in/foo.c:5:41: error: stray '\276' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                         ^
/in/foo.c:5:42: error: stray '\346' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                          ^
/in/foo.c:5:43: error: stray '\225' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                           ^
/in/foo.c:5:44: error: stray '\260' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                            ^
/in/foo.c:5:45: error: stray '\347' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                             ^
/in/foo.c:5:46: error: stray '\273' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                              ^
/in/foo.c:5:47: error: stray '\204' in program
 a = [[0] * N for _ in range(N)]  # 地图数组
                                               ^
/in/foo.c:6:37: error: stray '#' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                     ^
/in/foo.c:6:39: error: stray '\346' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                       ^
/in/foo.c:6:40: error: stray '\240' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                        ^
/in/foo.c:6:41: error: stray '\207' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                         ^
/in/foo.c:6:42: error: stray '\350' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                          ^
/in/foo.c:6:43: error: stray '\256' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                           ^
/in/foo.c:6:44: error: stray '\260' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                            ^
/in/foo.c:6:45: error: stray '\346' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                             ^
/in/foo.c:6:46: error: stray '\225' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                              ^
/in/foo.c:6:47: error: stray '\260' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                               ^
/in/foo.c:6:48: error: stray '\347' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                                ^
/in/foo.c:6:49: error: stray '\273' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                                 ^
/in/foo.c:6:50: error: stray '\204' in program
 flag = [[0] * N for _ in range(N)]  # 标记数组
                                                  ^
/in/foo.c:7:14: error: stray '#' in program
 n, m = 0, 0  # 地图的大小
              ^
/in/foo.c:7:16: error: stray '\345' in program
 n, m = 0, 0  # 地图的大小
                ^
/in/foo.c:7:17: error: stray '\234' in program
 n, m = 0, 0  # 地图的大小
                 ^
/in/foo.c:7:18: error: stray '\260' in program
 n, m = 0, 0  # 地图的大小
                  ^
/in/foo.c:7:19: error: stray '\345' in program
 n, m = 0, 0  # 地图的大小
                   ^
/in/foo.c:7:20: error: stray '\233' in program
 n, m = 0, 0  # 地图的大小
                    ^
/in/foo.c:7:21: error: stray '\276' in program
 n, m = 0, 0  # 地图的大小
                     ^
/in/foo.c:7:22: error: stray '\347' in program
 n, m = 0, 0  # 地图的大小
                      ^
/in/foo.c:7:23: error: stray '\