Compilare: main.cpp: In function 'void bfs()': main.cpp:28:21: warning: array subscript has type 'char' [-Wchar-subscripts] d[0][0][mark[0][0]] = 1; ^ main.cpp:40:46: warning: array subscript has type 'char' [-Wchar-subscripts] if(bun(ma[nx][ny], k) && d[nx][ny][nk] == 0){ ^ main.cpp:41:23: warning: array subscript has type 'char' [-Wchar-subscripts] d[nx][ny][nk] = d[x][y][k] + 1; ^ main.cpp:41:36: warning: array subscript has type 'char' [-Wchar-subscripts] d[nx][ny][nk] = d[x][y][k] + 1; ^ main.cpp: In function 'int main()': main.cpp:53:65: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d%d%d%d%d", &n, &k1, &k2, &l1, &l2, &c1, &c2); ^ main.cpp:59:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &ma[i][j]); ^